hey im almost 16 and well when me and my gurlfriend have sex, i can never last long (about 10-20mins at max) but i also then have times when i last like 2 hours and more, is this normal? and is there anyway too last longer every time?
also is having a penis around the size of 7 inches at my age big? my gf says it is but i can never make her like squirt or nothing during sex :/