This perfectly aligns with the theory I proposed in another thread:I can honestly say, I've popped a semi. For those of us who were never exposed to being naked around others, it's easy to make the mental jump that nudity implies sex. Plus, 99.9% of the naked guys seen were in porn, so it's a mental thing. It takes a little deconditioning.
I wonder if this attitude has developed as younger males have grown up without the normal, natural experience of being naked in school locker rooms with their peers, while at the same time they've been bombarded with pornography on the internet. They seem to have developed the mindset that nudity automatically = sex, which is sad. Another false premise.