Carefully rip the package it comes in at, take the condom out. Place the condom on the head of the penis with the tip facing outward, pinch the semen collecting tip to keep air from getting to it, hold firmly and start rolling it down. Voila!
To put a condom on:
With one hand, pinch the tip of the condom to leave room for the ejaculate.
With the other hand, roll the condom to the base of the penis or object.
Continue using this hand to guide any air bubbles out of the condom.