In my younger days I use to enjoy it . With the stress of the bend , it's hard to cum , but exciting . I use to share it with a girlfriend when I was a teenager . I think now I would have to train for a month just to get the head in . If your dick was very long , it would be easy . For me , I was very limber . If you can touch your knee with your head , then with a yoga pose , " pile driver " , just keep practicing . If you feel pain stop . You have to strech for about 30 min. a session to slowly get in shape .