I think it is largely a matter of age.   I am 61, and I have a hard time with two orgasms in one hour, which was no problem a couple of years ago.    I have never done better than 2 in one hour; but then again, I haven't tried.   I do remember a time about 7 years ago when I did 3 in two hours, but that is a fading memory for me.

Not only is it a matter of time, but also one of your health.  I am 56 and a diabetic (type2) on a number of medications.  I book multiple hour sessions so that I can "reload".  Even then, and with the help of the magic "blue" pill, I may only be good for one other blow.  The most I have achieved in three hours was three....and all the credit must go to the lovely lady that worked, untiredly, on me to make it happen.

I too am 61, and one cup of coffee is all I can deal with in one hour.  In fact, nowadays the most I can handle is two cups IN A DAY!  But I select my chicks carefully, and at least I'm getting a good bang for my bucks when I do cum.  In the old days, my record was 3 in less than an hour, and I could do that fairly often with the right girl.  That, however, is only a dream today.

when Sissy blew away and then kept right at it, I was able to rise again especially when the view of the Greek Islands was staring the one eye monster in the face. Thanks guys. Without you I would have never had that second cup.

...three erections for the hour and at least two eruptions.  I am 51.

However, I frequently go for a 30-min. one-pop quickie if I don't feel like doping up.