Hours.
When it's over it's over. Once I'm spent I have no interest in doing it again for at least a couple of hours, more likely a day or so. Always been that way from the start, even as a horny teenager.
These sort of "how big is/how much/how long/how thick" kinds of threads always elicit a lot of bravado and inflated claims, so I thought I'd represent the not-so-amazing.
Once I shoot I'm over it for a long time with my 10.5 x 7 inch cock that hangs in the toilet water, doesn't come close to fitting in a toilet paper roll, reaches my navel and an inch past, hangs out the leg of my boxers, is longer than most household objects like soda cans and remote controls and phones, doesn't fit in standard condoms, and shoots a huge load two yards away from my body every time.
