I don't know what kind of life or experience you've lead to have this kind of repressed and frightened mindset. Gooner communities are a little weird but that's about it. Sexuality isn't a bad thing at all, although the addiction and amount of time spent you mention indicate that it might interfere with other parts of your life.

No one is out to get you, even if some image got shared with you of someone slightly underage and you didn't realize it.

I'm more concerned with how hard you are on yourself and how negatively you portray yourself given the relatively benign details. What makes you feel evil? That's the part that's wild to me.