Within a couple of hours of a hot sex session after she's gone I have the desperate need to jerk of. Even if I'm not high. And I'm old. older I mean.
The better the sex the more I need to jerk off. After last night's great car sex, I'm whacking off a couple hours later. After every amazing DS session, if she doesn't spend the night, it's me and Rosie before bed. You'd think I'd be fulfilled but instead I gotta do it again.


sfgate.com
In short, the article says "you" (as the guy) probably hold out the orgasm as long as you can, and focus on your partner, instead of focusing on yourself. Therefore, later on you want to focus on yourself for your own pleasure.
I never thought of it that way, but it's actually a pretty good point and makes sense to me.