Eh, personally, I feel if both partners are happy with that, awesome for them, I have no issue with it. But, I for one can't really do a threesome. I'm a one woman kind of guy, and my fiance is a one guy kind of woman. Call me weird all you want, I may fantasize every now and then, but the idea of actually sleeping with someone else, or having her sleep with someone else, even if we're both involved, actually makes me feel ill. I just don't like the idea of threesomes. I don't want to see another guy or girl pleasuring my fiance, and I damn sure don't want another guy or girl getting all up in my junk, thats mine, hers, and my doctors.