What would cause this? The problem is caused, in my opinion, by the extreme over heating my body does during sex. I feel way hot, get sweaty, and feel as if cannot get enough oxygen. It feels like all the blood rushes to my penis and away from my head causing lightheadedness. I also have numbness in my penis causing loss of erection. If I get fresh cool air or have ice water it helps. This also happens in the shower, I feel like I cannot get enough air. These are the only two activities where I have this problem. I am height and weight appropriate, I lead a healthy lifestyle, and I have no know health issues.

High blood pressure? ANy ideas?

Heart problems, high blood pressure, O2 level in blood issues.

Sounds like a complete exam is called for.