I agree that this is something that can be "learned" or "taught." It's a matter of becoming comfortable with your body and learning to read its signs...and of letting go, both mentally and physically. The first time I did this it really freaked me out; I was being coached while I masturbated, so I really had to concentrate and feel what was going on with my body. I agree that it feels like peeing at first, but OMG it's so freaking hott. And water intake does have a lot to do with it, not just the intensity of the orgasm.