MacGyver why would they bother?
It goes deeper than that. It has to do with control in the political sence. Pre roman catholic church sex was a form of worship. This didnt sit well with the emporer of rome who wanted ALL power for himself. If people could just have sex to talk to god what would be the point of priests and the church. This would lessen his power over "his" people so he made sex something dirty and demonised all the fertility symbols
Look at the symbol of satan, it bares a remarkable resemblance to the greek male fertility god. The word HORNY comes from the horns on that god (he was half goat if i rember correctly)
how interesting, that god is pan.
by making something as desirable as sex a reason (of great importance within certain circles) to go to church, they're dragging a lot more people into religion. within catholicism, to maintain your social standing and the love of god, the child needs to receive a variety of blessings at specific ages. they force you to keep coming, or coming back, so they keep getting chances to brainwash you, and fill the collection plate.