question: Dear Dr im 21 yrs old.im doing had job since im 15yrs old.now im my sperms get leaked very fast with in 15 sec.so that i cant spend more time in sex.kindly suggest me how to control hand job and how to increase my sex duration..? And also im very lean ..is that the reason because of hand job im very lean..kindly help me out in this.kind request dnt post this query in pubic pls dr.,thank you