Sophie - My 7 year old is very aware of what is and isn't ok when it comes to her body, my 3 year old has a learning disorder though and her speech is a bit behind her level (about a year behind I'd say) so it's a little more difficult to make sure nobody does anything with her.
There have been other signs I've done the same with. Little things that bother me but that I could see myself easily blowing out of proportion. After my relationship with my ex I've gotten really good at that.

Hampster - He deleted it the moment I brought it up. I tried finding it after. I already intend to ask about it again in the future and request that both of us stop hiding our porn and make it a part of our sex life to discuss that. It's something I tried before but I have some pretty bad jealousy issues.

Veronica - My ex only made one accusation and after discussing the topic with my daughter she made it quite clear he never did anything like that. She just didn't like the way he tickled her. Him and I talked about it and he agreed not to tickle them for a while. Now he'll tickle them and it's brief. If I feel like it's going on for too long I'll tell him to stop.
The only time the door is open is if my daughter gets up to go to the bathroom at night. The few nights he does sleep without clothes he knows they're not even allowed in the room.
Ending this relationship would require uprooting both of my daughters that live with us, switching their schools, and finding somewhere to live with very little income. I can't work through the weekdays because my 3 year old is only in school 3 hours 3 days a week. I only work weekends and make 100 bucks a week at best. My 3 year old also doesn't do very well with large changes, like changing schools. It's a serious accusation, I know, but it's a serious relationship too, and just ending it over a few suspicious could cost me a lot more than a boyfriend.