I think and talk about sex too much

Ever since I was a teenager, I've has this fascination with sex and everything related. I was and still am an avid masturbator. I love talking about sexual acts, reading about that stuff and learning new things. I want to hear other people's stories, though people seem unwilling to share a lot.

I worry that it may be too much. I enjoy sex. I need it at least once a week. My boyfriend however, does not. Yet I keep talking about sex with him. I like indulging myself. I like fantasizing. I just worry that it gets brought up far too much. Am I crazy?