The foreskin of the affected person is too tight to be retracted behind the head of the penis.
John: Sex hurts?
Greg: Dude! I have phimosis.
"Oh, he's just got phimosis..."
"too much information."
No, we didn't choose to be born with it, but it was identified by the doctor and was dealt with through circumcision, with the result that we now don't experience seering pain during sex, and can masturbate.
- Fuck off. I had phimosis.