Migrants are being taught how to attract women and sexually arouse them in German seminars run by a pickup expert known as 'Mr Flirt', it has emerged.

Horst Wenzel usually makes his living teaching German men how to approach women but is volunteering his skills to help the country integrate more than a million refugees who have arrived in the last two years.

The 27-year-old teaches asylum seekers lines including 'You have a beautiful voice' and gives tips on how to arouse women.

Hostility towards asylum seekers has been on the increase ever since groups of foreigners - mostly young men from northern Africa - robbed and groped dozens of women on New Year's Eve in Cologne.

Horst Wenzel (standing) usually makes his living teaching German men how to approach women but is volunteering his skills to help the country integrate more than a million refugees who have arrived in the last two years

The 27-year-old offered his service with hostility towards asylum seekers on the increase ever since groups of foreigners - mostly young men from northern Africa - robbed and groped dozens of women on New Year's Eve in Cologne

Most of those in Wenzel's classes are from war-torn Muslim countries with vastly different relations between the sexes.

One class of Syrian and Iraqi refugees were given examples of pickup lines including 'I really love the scent of your perfume'. Other lessons include the differences between male and female orgasms.

Last week, in Dortmund, Wenzel offered his third installment of 'How to fall in love in Germany,' taking 11 young men through their paces. The students conceded they had a lot to learn.

After inviting his students to give examples of pick-up lines, Essam Kadib al Ban, 20, raised his hand.

'God created you only for me,' he said, then tried another: 'I love you. Can I sleep over at your place?'

Horst Wenzel winced, but caught himself quickly.

One class of Syrian and Iraqi refugees were given examples of pickup lines including 'I really love the scent of your perfume' and 'You have a beautiful voice.'

'Don't tell them you love them at least for the first three months of your relationship, or they'll run away,' he explained patiently. 'German women don't like clinginess.'

'Finding a relationship is the best way to integrate, and that's why I'm giving these classes,' Wenzel said.

Most of the hostility towards refugees in Germany targets young male asylum-seekers from Syria, Iraq and Afghanistan, who make up the majority of the migrants reshaping Germany.

Last year alone, 890,000 people applied for asylum, with hundreds of thousands more applying this year.

Violent crimes against migrants and arson attacks on asylum shelters and mosques have increased in frequency, and refugees say they have experienced discrimination and abuse since the Cologne attacks.

Other lessons include the differences between male and female orgasms and how to arouse a woman

The anti-foreigner sentiment is reshaping German politics as well, with the populist Alternative for Germany party surging as it campaigns against Chancellor Angela Merkel's decision to welcome the migrants.

The flirting class, participants said, offered a way to get beyond the adversity.

'We are really benefiting from the class,' Kadib al Ban said. 'The teacher is telling us how German women think, how to talk to them ... and understand their traditions.'

Wenzel usually charges 1,400 euros ($1,500) for a private one-day class, or 4,000 euros for a group.

The tall blond is an authority in Germany when it comes to the art of seduction, giving flirting advice on TV and radio.

He says a half-million Germans follow his 'flirt university' blog on how to find Mr. or Mrs. Right. For the migrants, Wenzel is volunteering his time in occasional classes across the country.

'A lot of the guys are absolute beginners when it comes to flirting, dating and sex,' he said.

Last week, in Dortmund, Wenzel offered his third installment of 'How to fall in love in Germany,' taking 11 young men through their paces. The students conceded they had a lot to learn

The class got off to a rocky start. The migrants, unsure what to expect, sat with their coats on and their arms crossed, eyeing their cheerful coach suspiciously.

Wenzel chatted about pick-up lines, paying compliments and original ideas for first dates. Impress and entertain the girls, Wenzel advised. Invite them to the theatre, rock climbing, a concert, or take them on a trip to London or Amsterdam.

That last piece of advice would probably work better for Wenzel's regular clientele of rich Germans; asylum seekers aren't allowed to leave the city they're registered in, and don't have the money to travel in any case.

Then he moved on to sex.

'Men and women have sex all the time — on the first, second or third date, that's normal.' Wenzel said. 'It's not a big deal in Germany.'

The men in the room giggled, but snapped to attention.

When Wenzel moved onto the differences between male and female orgasms and how to arouse a woman, they fell silent again. Several men blushed and others looked down at the floor in embarrassment.

One of the students became indignant, whispering in Arabic to his neighbour: 'But having sex before marriage is a sin; it's haram!'

But there were moments of realisation as well.

Refugees take part in a flirt workshop called 'how to fall in love in Germany' in Dortmund, Germany

Asked how to impress a German woman, one student suggested getting ripped at the gym.

Wenzel countered that most women don't go for the body-builder type. Another suggested picking up a date in a Ferrari.

Wenzel said that would attract women interested only in money. The students readily agreed, perhaps because most were thin and quite a long away from being able to afford a sports car.

When the class ended, most of the men said they had learned a lot and were eager to put their new skills to use.

Omar Mohammed, a shy, 24-year-old goldsmith from Syria with spiky black hair and almond-shaped eyes, said he's attracted to German women, with their Nordic looks and punctuated accents. But they remain a mystery to him, and he has no idea how to approach them.

'It's hard to meet a girl when you don't speak the language well and can't really talk to them,' he said.

'There are a lot of differences, not only the culture and religion — we just don't have this total freedom at home.'

Still, he said, 'I'd love to marry a German woman and live with her. She could help me with the language, and she knows the place and the laws much better than I do.'

Some German women were receptive to the idea. Jasmin Olbrich, having a quick lunch of French fries at a food truck outside the educational centre, said she liked the Middle Eastern looks and complained that German men 'drink too much beer, watch way too much soccer and are just so white!'

But Kadib al Ban, the Syrian with the flowery pick-up lines, remained somewhat unconvinced.