From my experience...

I have never had a guy cum 5 times in one hour. I've had some cum 3 or 4 times in a multi hour though.  I'm also expecting my own orgasm in any encounter.  
I really wouldn't mind a guy Cumming that many times, it would actually be really hot!  
XOXO  
TL

Never.

I had a civie get me off 3 times in less than hour and this was after working a 16 hour day. Best I ever remember , Still remember her name but won't publish it here.

.........I have seen 3 in an hour, 2 from BBBJ and followed by multi positions with a HJ to completion  I have seen 5 in an hour with 3 partners though............suzee

There is one that most of us know.....

He's younger than most of us ladies, and he can cum 5 times in one hour. I won't say his handle because I don't want to embarrass him (or blow up his ego, depending on how he feels about it) LOL! But, he is the only one I have ever met that can cum that many times.  

Maybe he'll come and chime in.

take getting another nut out of guy as a personnel challenge!

I would say three is not the norm but certainly not out of the question

I couldn't ever cum that many times even in one night.   Then again my orgasms are insanely intense.   I go numb and nearly pass out after.  Better than drugs.

Mid -> late 20s here (my birthday is this week). I pretty much can come 4 times in an hours with a hot girl any time. Did 5 twice with a provider in an hour. 3 time in 40 minutes last week - all from sex with little bbbj in the middle (the lovely Camille from L&S).

It basically comes down to the lady you are with. I can stay hard and keep going after changing out the cover. Some ladies just aren't into the intensity.

Also why I get peeved by the 2 and done providers. I'm not even happy till round 3 and I'm also trying to break a sweat here - got to get my workout.

I should probably change my handle to energizer bunny

Back In The Day......

3 times in an hour - each thru intercourse-with a condom.......but after the 3rd.....Dry Heaves and an aching prostate would end the session !!