I present to you the following evidence that Women are meant to play with each other as well as men
1) All babies have breast feeding instincts to suckle nipples
2) Most all children prefer the company of women to men until they are beginning to enter puberty. At which point men are encouraged to transfer this social energy into sexual energy and seek the company of women. Where as girls are encouraged to SUDDENLY become interested in clumbsy, rough boys.
3) Women of all ages are more confortable being physical and affectionate with their freinds of the same sex, holding hands hugging, dressing and undressing together ect. And are also more likely to compliment each others appearence.
4) Women cant get each other pregnant, and are much less likely to transmit disease to one another through sexual contact. So the situations described in example three are very tempting to elevate to the next level without fear of bad consequesces.
5) the female form is MUCH more elegant and generally appreciated by all humans on some level. The male form is functional and awkward. Hence most Erotic thoughts center on the female.
6) they smell so good together! I mean if man wasnt meant to have MFF threesomes, it wouldnt smell so good under the sheets when we do. Instead there would be some offensive Pheremone released to discourage the behavior. Case in point ever been in a mens locker room? phew!. Or even in a Hooters resturaunt where the sex ratio is alllllll wrong, I cant even eat in those places because they smell so bad it ruins the tatse of the food, too many men excited over too few women.