I masturbate often.during masturbation i shake my penis the erection is good but when i stop shaking it ,the erection looses in seconds it become semi hard and in 20 seconds it looses fully.if i shake it penis remain hard how much time i want .iam just 21 years of age and my testestorene level is 5.50 and i have no
sugar no bp .the doppler test of penis was also normal
Why i cant maintain erection just by thinking i can easily get erection but looses if there is no hand or no stimulation it is same with gf if i insert penis quickly i can insert if i take time i looses erection