I sometimes get a sharp pain above my eyes before cumming during sex causing me to stop. what is it?

? Sinus ? Muscle: If you are clenching your jaws or gritting your teeth it can lead to headache and pain. Sinus pressure and tension can also cause pain. You might benefit from an ENT evaluation and possibly a ct scan of your sinuses.

Probably not related: As there aren't any anatomical relations between your sexual organs and your eye, they are probably not directly related. However, this may represent increased pressure in your head being transmitted to your eyes which may cause and/or exacerbate pre-existing eye inflammation. Using artificial tears 3-4x/day for a few weeks as well as cool compresses may be able to help with these symptoms.

Sex headache?: Some folks get headaches or migraines when they come. If this continues or gets worse, talk with your doc. Check out reasons for eye pain or headaches so that you can feel better.