pretending

I'm looking for videos of people who start fucking almost inadvertedly (for example... dick slips in by accident, let's pretend it's not really sex...), or... People who pretend they are doing something else... A medical exam that requires penetration/masturbation but there is a lot of acting...

I'm looking specifically for links to porn content where a female actress is trying to pretend something doesn't feel good or conceal that she is getting sexual pleasure. Ideally, a situation where what's happening isn't intended to be sexual but is arousing her and she's embarrassed about her...