Well, I've got quite a few sex issues, but this one has been a long time coming.
It's a long story... Here goes.
When I was six or seven (yes, I'm sure it was one of those ages) I would lay on my stomach, wrap a bed sheet around my waist and pull in opposite directions until it was tight against my waist and hips. I didn't know why it felt good at the time, but it helped me get to sleep. I remember thinking about how weird it was and feeling so guilty for doing something that felt so good that I apologized to my father for doing it. Anyway, it was only a few years ago that I found out I was actually having orgasms when I did this. Up until that point, I thought I was just incapable. I tried everything in junior high to get off, like shower heads and fingers and all sorts of things, but no form of insertion did anything for me. In fact, I don't have to touch myself at all. I just need a blanket, bed sheet, or whatever. In addition, I've never gotten off, even remotely, on sex with someone else. In fact, I'm not fond of it much at all. I know this is weird, but is this common?