Biology has been winning since before we crawled out of the slime. A hard pedro has no conscience.
Interestingly last night I watched a show on the History channel that examined lust. They showed brain images of someone (in this case a woman) who was watching erotic images. It turns out that as the “turn on” region of the brain “turns on”, another area of the brain that has to do with restraint loses power. It was the biggest no duh show segment that I’ve seen for quite some time!