When I was a kid, like 13...man...there were a few times that I know I got myself off 3 times in 10 minutes or less, but that was part of a much longer 10-in-a-row marathon. Some of those didn't include any refactory period...I wish I could do that now, lol.
These days, I pretty much wear myself and my partner out on the 2nd one.
For me, the first one is always much better, and there usually isn't a second one. I just don't meet girls with that much appetite very often.