Well, now. Where were we before being so rudely interrupted? Oh, yes. We were discussing the many reasons guys jerk off. Though we hadn't gotten very far, had we? Jackus interuptus...
Once "horny" (the #1 reason) is taken care of, the remaining reasons have no particular order to them.
We apologize, Ladies, if this only enhances our "selfish pig" image - but... You know how you like to sneak off and relax (though, we suspect you're secretly rubbing one out)... Well, - and regardless of sexual orientation - there are times men just want to do the same. We want alone time. We want to strip down, kick back, close our eyes, and relax.
It's not planned. We're not horny. It just happens; it evolves. Our hands naturally wander to the package.
The cock gets hard and starts to ooze that lovely, slippery, pre-cum.
And, in those times, we don't want to have to concern ourselves with anyone's pleasure and gratification but our own. Whether it's a fast and furious pounding of our pud,
or a slow, sensuous stroking,
we just want to enjoy our cocks and the awesome feel of spewing the spunk.