How did you describe your symptoms to the doctor. It would appear that this is his only reference. I guess as emi_b says, he really should have done more in depth testing.
In my honest opinion, Vincent, you are probably suffereing more from sexual exhaustion than from POIS. A normal POIS sufferer just cannot have more than 1 orgasm in 2 or 3 days at BEST. It's more normal 1 orgasm in 5 days.
Also, it may be that you have some imbalance that makes you unusually horny, similar to the same thing that women have(don't remember what it's called, I'm in day 2!!), which Dr. Waldinger also studies.
So have a look at those things too. There may be something that could help you there as well.