Never claimed it was. If you're talking about the Catholic Church thing, 95% of the molestation cases were NOT pedophilia (relations with a pre-pubescent kid). They were molestations by homosexual priests against teenage (and sexually mature) boys. Many, many homosexual men are attracted sexually to teenage boys. 90% of the teenage prostitution in New York City involves teenage boys selling themselves to homosexual men. Homosexual publications and websites are full of stories and pictures involving teenage boys. The same are full of solicitations for sex with teenage boys. In general, teenage boys are unsafe around homosexual men. My sons are a thousand times safer in the Boy Scouts than with priests in the Catholic Church.
The "natural" straight male is wired biologically to be attracted to very young women, and older girls. It makes perfect sense that a homosexual male would also pursue the youngest of men or older boys.
However, we needn't be "natural" if we choose not to be.