Every time I have an orgasm (alone or with a partner) I have intense feelings of guilt. I was not brought up in a religious household and was never told to "wait until marriage". I've been in long term relationships with all my sexual partners so it's not like I feel guilty for sleeping around. It's getting to the point where I'm not enjoying sex anymore because I dread the feelings I have after an orgasm. Is this normal?

I have a problem that is really uncomfortable for me to deal with, but I'm embarrassed to ask anyone if they have had the same experience. Whenever I take an exam, I sometimes ejaculate in my underwear. I think it may be some sort of stress reaction. Once it's over, I feel very calm and can continue on. Is something wrong, and how common is this? What should I do?