A friend taught me how when I was in the fifth grade and I've worn it that way my whole life, nude swimming in high school, even in the military where nudity was just a part of life with open showers. It helps to be cut, doesn't work so well with the uncut guys I've tucked in. You can start by using a large circular object perhaps like a silver dollar or larger. Push it in on the head and back into the ball sack. It should stay. Train it this way for a long time and eventually you'll look dickless, and it's the best way to jack off, an explosive orgasm. Let me know if it works for you.