Girl-on-girl; yes! Girl on my girl; NO!

Sex is a funny thing. On one level it's all about arousal, touch, skin, erections, climaxes and pure pleasure, but it also has a funny habit of involving emotions. Very often the better the sex, the stronger those emotions. So the fact that you and your girlfriend have an adventurous love life together doesn't mean you want her to have an adventurous sex life with anyone else.

Having an adventurous love life with someone else - guy or girl - does raise the chances that she'll get attracted elsewhere and leave. You don't want her to leave because, it sounds to me as if, you're bonding to this woman and you don't want to lose her.

I don't think it's about not being up-to-speed sexually, I think it's about deciding whether you want to have an open relationship or not. If you do, then you have to accept that you risk loosening the bonds between you and drifting apart. You may, as the vast majority of people do, decide that you don?t want to take that risk.

You must face up to your feelings and don't blame your girlfriend, don't get irritated with her - your irritation is not her problem.

Admit to her that you feel threatened, and then discuss what that means for your relationship. I suspect you'll find that there's a lot of love lurking underneath your wild sexual adventures, and while that may be a surprise, it could also be good news for both of you!