as a bi- sexual man i know that this happens very often , it seems that after a certain age about 50 yrs old a lot of guys are exploring thier bi-sexual side , the short and simple answer to it seems to be that woman need a reason to have sex with thier hubby , 2 guys just need a place to have sex , you know the "wham bam thank you mam" thing . lots of guys are sneaking away from thier wives and g/f's to have fast sex with guys . it's all done and over with in less than 20 minutes .......no dating , no dinners and dancing ,just jump on it and screw the guys asshole fast and furious . than go home to the wifey