yes.
Yes; the male is only cleaning his sister. My cats (both female) tend to do the same thing in various spots.
Male cats may lick female cats as a form of grooming or to show affection. It can also be a way for the male cat to establish dominance or mark the female cat with his scent.
yes this is a common mating ritual. it is done as a seducing technique. Also there are certain traces on a female cats bottom that is benificial to a male cats digestive system
no your not gay but the male does have a g-spot in there anus wich can create a orgasm or strong feelings
There is nothing to worry she just wants to get attention and mate
Female cats produce a special hormone when they are in estrus to let the male know they are ready to mate. In essence, this mating position is an advertisement to male cats that they are in heat and ready to mate.
Because you let him.
you can't make a male lick the female unless the male likes the female.
Most cats that are on friendly terms with each other will lick and groom each other.
Male cats may lick each other's bottoms as a form of social grooming and bonding. This behavior is normal and helps to strengthen their relationship and establish hierarchy within the group.
As in cats that are male? Yes, cats can be male or female.
yes.