Sex is getting a little stressful... it's like I have to focus all my mental effort on not cumming. Sometimes that means stopping ****ing her or withdrawing. Sometimes it means thinking about disgusting stuff or sports or something. But it's like a constant battle to not cum too early.

I always win the battle and can usually keep from cumming as long as I want (it gets easier after the first 5 min). But just for once I'd like to be able to let go and just nail her without thinking too hard.

If I don't try to prevent cumming, I usually cum in a couple of minutes.