Scientifically speaking, why am I so horny? In the last 5 months I've been fapping daily, having sex sometimes and being horny most of the time.
One day I had sex with 3 different people and the next morning I was fapping again.
When I go outside I see butts, legs, lips, skin....everything is so appealing.
My dick is hard right now and probably I'll search for sum porn again.

Is it normal? I already took STD blood tests and I'm clean but I don't want to get infected with something or do something crazy.