Back in the day, I've attended two LMP parties on the same day. I've heard of people who even went to all three on the same day, haven't done that myself.
Sometimes, after an LMP party, I'd leave shagged out but feel horny an hour later. I suspect it was the residual Viagra in my bloodstream... I'd then go to one of the Soho parlours for an afters party.
Occasionally I still have two points on a day. Not a problem as long as I have a break. I do struggle to come the second time, but the strain is part of the pleasure. A bigger problem is the financial strain on my wallet, otherwise I'd do it more often.