males have penises because our DNA says so. if it didn't you would have a race of females who could'nt reproduce.
Yes they do
Yes, male cats (tomcats) have penises. They use their penis during mating to transfer sperm to the female cat's reproductive tract.
No, all penises do not look the same, but they do have the same parts. Penises vary in size and vary slightly in shape depending on the species that they belong to and whether or not the foreskin has been removed.
because giggling is used as a form of flirting
Yes, male sheep have penises, which they use for mating. The penis is typically housed within a genital sheath when not in use.