So you'd like to be able to enjoy the sensation of orgasm without the accompanying mess?

Do what the ancient Vikings did as a form of birth control.

Just before you reach the point of no return, search with your fingers between your ballsac and anus for that soft spot that will allow you to compress the urethra. Press in. You don't have to press hard (bruising or soreness could result).

This will allow you to have a 'dry' orgasm by forcing the ejaculate into your bladder. It will be expelled later when you urinate.

This might not work as well for heavy pre-cummers but with a little experimentation you will either love it or hate it.

Pecker