If I spank it daily (normal for me) then when I have sex, it goes down pretty fast. Sure there's the midway hardon that lasts for a while after, but I'm not feeling the desire to continue.
If I don't spank it for a week (torture, basically) then I can go 2 or even 3 times with minimal down time, as in a couple of minutes. Even then it's never totally down, just midway, and I'm still in the mood for more.
So basically spank it daily and get used to that, then go without and your body will build up, expecting the release
every waking, agonizing minute
edit: Another way to do something like this is to have at it until you're about to pop, then pull out and let it twitch, but don't finish. You might drip a little, but it's not a complete orgasm. Then go at it again, slowly.