It happens a lot on certain positions like cowgirl or reverse cowgirl, or pretty much when a girl is on top that I loose the erection and goes soft.
It is like I have no feeling in my penis or stimulation at all and I feel nothing. Added to the psycological fact associated with it.
Does anyone have trouble maintaining erecrions when the girl is on top? I can manage when doing doggy style or missionary, or me standing and she at the edge of the bed but not other positions!