This poses an interesting question to me. I've read so many books and consumed so much media that makes the great assumption that all people can be seduced, or have casual sex with someone they find attractive. It never really occurred to me (given I've only really recently identified that demi is what I am) that this is the perceived norm.

Most of my friends really enjoyed casual sex and flings, and given all the fiction I've consumed reiterated their experience, I just assumed I was the oddity.

Thanks for the realisation OP!