Male cats do not have prominent nipples.
It depends on if your female cat is sterilized or not. Also, keep in mind that male cats spray or mark their territory and are more likely to do so in a home with multiple cats.
Yes; the male is only cleaning his sister. My cats (both female) tend to do the same thing in various spots.
As in cats that are male? Yes, cats can be male or female.
yes female cats shed more then male cats
yes
They are male cats.
Yes. Male tortishell cats are rare
They are testicles on male cats.
75% Male cats are most adopted.
for one thing, you can't just throw your little lady in the male's territory and hope that all will be well between them. chances are that the felines will most likely fight, but the shelter that i work at may be different from this scenario as there are cats everywhere
Male cats are often called tom-cats or toms. :)