Hi,i m male of 23.m doing masterbatten for last 8 to 9 years..i ally feel comfortable and joyfull when do so,but i wnat to ask that is masterbatten is harmful?I always did it wit my right hand,see alot of porn movies etc..my oenis is slightly in curve towards left side and i have a very less ejection time,means when i did masterbatten,then semen omes out of my penis just after 3 to 4 minutes,i want to etend this time and also please tell me about how i can increase my sexual power and time of ejection..Thnaks.