The message is clear enough:
typical male homosexuals are attracted to other male adults, though maybe often younger than themselves (don't promiscuous heterosexual men prefer younger women?)
there is a recognised condition which makes some men feel attracted to under-age boys, and these men are not normally attracted to adult men. You might still call them homosexual because they don't go for little girls, but there is a difference and using it helps to deal with the two different cases.