DEAR DEIDRE: SEX is very painful for me and I think it is because my boyfriend is so well-endowed.

I never had this trouble with my ex.

I am 26, my boyfriend is 28 and we have been dating for six months.

1 Sex has become too painful and it's a problem Credit: Getty - Contributor

My boyfriend’s penis is twice the length and girth of my ex’s but I have only had him as a previous lover in my life so I am not sure what’s the norm.

I mentioned this to a friend who’s had a number of ­partners and her eyes lit up.

She suggested having a threesome so she could judge for herself and give me a second opinion.

I thought she was joking but she’s been flirting with my boyfriend ever since.

I am starting to think there must be something physically wrong with me and that is why sex is so painful.

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DEIDRE SAYS: Tell your friend thanks but no thanks.

A threesome is just likely to add to your problems.

If your boyfriend is large, then it is vital that you are fully aroused before you have sex.

It is also important that he is sensitive to how it feels for you.

My e-leaflet Too Large? explains some techniques to resolve this issue.

Deidre's daily sex tip