The guy in the example happens to terminally value being attracted to children. I didn't mean that that's what being a pedophile means.

Aside from that, I am not sure how the way this ties into "A rational agent should never change its utility function" is unclear - he observes his impulses, interprets them as his goals, and seeks to maintain them.

As for SOs? Yes, I suppose many people would so prefer. I'm not an ideal romantic, and I have had so little trouble avoiding straying that I feel no need to get rid of them to make my life easier.