i find it strange that the word "hygiene" has been brought up several times.
i wonder how many men make sure of their cleanliness when expecting head. balls have some of the worst sweat ever (think about that sack just glued to an inner thigh), and let us not forget the smell of stale urine also from the fact there is no wiping. and the hair on the scrotum might be the grossest human hair imaginable- worse than the hair in the crack.
i am not saying that one is grosser than the other, mind you. everyone should just have equal expectations of themselves and others.
also, i don't think that a female that might smell a little funky down there is "unclean", they just might have had their daily shower 12 hours earlier.
my boyfriend and i give and receive equally.