Since I started having sex at 15 years of age, I was able to go as long as I wanted to without cumming. It even took me forever when my GF was giving me head. About 3 years ago, she would say that her mouth would be sore and get a little headache from doing it so long. She would go at it really good and then stop right when I am starting to get in the zone. It was almost a total erection killer to be honest. However, I didn't force her to keep going. Anyway, I ended up forcing myself to cum sooner when getting head because I wanted to finish so bad. After doing that quite frequently (3 to 5 times a week) I developed something like premature ejaculation. Since then it has felt so sensitive that I find myself cumming within 15 minutes. If we have foreplay, it's even sooner. Sometimes she doesn't end when I do but I am a gentleman so of course I make sure she gets what she wants. I don't know if this is actually considered premature ejaculation or not but it's frustrating as all hell. Has anyone else experienced this?