They don't know. They assume
They may assume that you are a virgin or lips virgin because you are socially awkward.
People used to assume that I was a straight "A" student, because I was quiet in school. That would have been nice, but I was actually struggling in school.
Things that have been assumed of me:
- excellent in school
- don't know a thing about drugs (thought I should be unaware of 4/20, or afraid to tell me about hard drug experience, because I will be shocked or judge negatively
- prude (expected blushing and "oh dear" response when shown dirty picture - meh)
- against piercings or tattoos, because I don't have any and don't want any. (I like them on other people, actually)
- kiss a** (I don't go looking for a fight and I try not to make waves, but one of my strengths is that I'm not afraid of authority. I complain when I feel it's necessary)
I hate it when people make assumptions of me or anyone else for that matter. It's a major pet peeve of mine.
Anyway, don't worry about it. Some people are just plain naive.