Yourself

Well you have both, and it's not like you haven't thought about it before. It's basically masturbation, right?

You set your cock on your desk chair and slowly lower yourself onto it. Your pussy is already moist from anticipation so you quickly bury yourself to your hilt in your own cunt. The sensation is mind blowing. You moan as you start to bounce up and down on your dick. It feels soooo much better than any of your vibrators or your flesh light. You idly play with your nipples as you fuck yourself faster and faster.

Unable to hold on for much longer you cum into yourself, filling up your cunt with your own hot cum. You screech in pleasure and ride the orgasm for several minutes.

After you come down from the heights of orgasmic bliss you feel a wave of exhaustion from the double fucking. You pull off the cock ring and marvel at how clean you are down there.

A knock at your door interrupts your train of thought. Someone must have heard you fucking yourself and came to check on you. Your cock springs up again at the thought of a new victim.