Guy Orgasms. is this normal?

This guy I hooked up with came within like 2 minutes of sex. 
He said it had been a while since he had sex which I thought was good. 
Then he got hard again and came AGAIN. But this time he lasted a little longer. Like long enough for me to get off. 
I thought guys could only orgasm once every like 12 hours or something?? 
I'm not very knowledgeable when it comes to guys and their orgasms.