As I was writing this, I noticed that you are were saying this as if you were a pedophile, but I was almost done so I will post it anyways. The last part is probably most relevant. If a pedophile were to claim this I would say something along the lines of this:
Children are unable to make those decisions. A pedophile can’t say that children are capable of knowing what they are doing; they aren’t. For example, a child may enjoy ice cream and candy, but they may not understand that ice cream and candy is unhealthy for them. They can not have a diet filled only with sugar, regardless of how much they like it. I also doubt any child would like to be sexually abused, but that is a totally different subject. I used diet as an example, and, to be honest, that is a terrible example. DIet is far more simple than sexual relations. Many adults do not understand what sexual relations and relationships truly mean, so you can not expect children to.
Catholics do not agree. There has been no scientific evidence that homosexuality is genetic. Also, Catholics do not condone homosexual activity. We believe homosexuality is disordered. Having homosexual tendencies is not a sin, but to engage in homosexual acts is a mortal sin, so that point in and of itself would be invalid( to a Catholic anyway). Also, the difference is that many scientists believe it is a hormonal abnormality while the child is developing before birth that causes homosexuality. For example, a homosexual male may have had a larger amount of estrogen and a homosexual female may have had a larger amount/proportion of testosterone than normal. Some scientist believe that this may lead same-sex attraction. In other words, it is an abnormal amount of a normal hormone that triggers same-sex attraction. There is not a hormone that would create attraction to children. That is the major difference, I believe, in the perception of pedophiles and homosexuals in the scientific world. Once again though, there is no scientific proof of this phenomenon. Even if proof did develop, it would not change the morality of homosexuality or pedophilia. Homosexuality and pedophilia should be looked at as a cross to bear, not a trait given by God.