My nighttime bathroom trips are caused by sleep apnea. When I go to the bathroom at night, it's always a full bladder full, and good pressure, so, for me, it's not my prostate. When I get to snoring real bad at night, I stop breathing. When I start breathing again, there's a sudden rush of fluid to my heart, which results in somehow my heart telling my body to get rid of the fluid, through urination and perspiration. Quite often, when I wake up to go pee, I'm soaking wet with sweat.

I discovered, that if I prop myself up with pillows, and keep my head supported, I don't snore as bad, I don't stop breathing, and can sleep through the night, without having to get up to pee.