A professional boxer and father-of-ten claims that he was drugged and does not remember having sex with two men for an x-rated video that is now available on a gay subscription website - but admits to agreeing to take part in the porn film and getting paid $4,500 for it.

Yusaf Mack, 35, who has fought several world champions and is known as the 'Mack Attack', has chosen to speak out and defend his heterosexuality after he was identified as one of the men in the explicit film, which appears to have been online since December 2014.

'My whole life, I've been what they call a wh--emonger. I love females,' Mack told Philly.com.

'The only time I touch a man is when I'm in the ring fighting.'

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Explicit: A screenshot of a video from a gay porn website purportedly showing professional boxer Yusaf Mack (right). The 35-year-old says he has no memory of appearing in any film and believes he was drugged

'I don't remember': Yusaf Mack, who has fought several world champions but retired last year, has spoken out to defend his heterosexuality after he was identified as one of three men in an explicit porn film. He is pictured here in Nottingham, Englad, in November 2012

Mack, who is engaged to a woman, admits that he agreed to take part in a porno because he needed the money.

He retired from boxing last year after losing a six-round fight to Cory Cummings.

Mack said he was contacted with an offer to do porn on Facebook and traveled from Philadelphia to New York one night to make the video, believing it would be heterosexual.

He went to an address in the Bronx, where he said there were naked women walking around.

'I think, ''It's about to go down'',' he told Philly.com.

'I needed a drink or something. They gave me a pill and a shot of vodka.

'I took the pill down with the vodka.'

Mack claims he has no memory from that point.

The next thing he remembers is someone waking him up on a train at 30th street.

He then found $4,500 cash in his pocket, he says.

The 35-year-old believes he was drugged at an apartment in the Bronx and that the video must have been filmed afterwards, however he said he still has not seen the footage

Promising: Yusaf Mack was considered a strong young fighter before retiring from the game last year. He is seen here in a fight against Librado Andrade (left) in Las Vegas in 2007

However, somehow during the time of taking the pill and waking up, Mack appears to have engaged in explicit and extensive sex acts with two men and was filmed doing so.

His face is not covered in the footage and neither are his distinctive body tattoos.

The video was then put up on DawgPound USA, a gay porn site featuring African-American men.

Members pay $24.95 to join the site and then a monthly fee of $19.95.

Mack said he chose to forget about what happened and went home, however everything came back to haunt him on October 16, when he was out in Philadelphia and realized some of his friends were not speaking to him.

Finally someone pulled him aside and explained that people had seen the video.

'I don't know what y'all are talking about,' Mack told them.

'That ain't me. I don't remember that.'

His friends then convinced Mack it was him in the video.

He told Philly.com he still has not seen the video and wants to track down the people who made it.

Former light heavyweight contender Yusaf 'Mack Attack' Mack, from Philadelphia, has now found himself fighting a gay sex scandal

'The only time I touch a man is when I'm in the ring fighting': Yusaf Mack maintains he not willingly appear in a gay porn film

However, he said he has forgotten his Facebook password and has not been able to contact them.

'I'm just hurt right now,' he told the website.

'I can't really sleep at night, but I'm getting by.

'Everybody thinks I'm going to hurt myself. I've got to stay strong for my children.'

Mack's children range in age from three to 21

'All my real friends who really know me, know I like females,' Mack added. 'I'm still me.

'You've got to realize that the ones that are not really talking to me are the ones that probably have skeletons in their closets.'

The film of Yusaf Mack has appeared on the gay porn website DawgPound USA. It is unclear who made the video, but Mack said the filming took place at a New York apartment

DawgPound USA did not respond to questions about the video when contacted by The Daily Mail Online on Tuesday.

There is no suggestion the website produced the video.