In my experience there are 2 kinds of bottoms.
#1. They get railed for about 10-20 minutes and tap out exhausted. Leaving the top pent up and wanting more. (I deal with this a lot)
#2. Can take hours of pounding’s from multiple parters over a 3-4 day period and will never be satisfied and prefer it that way. Only becoming satisfied at the end of the con when they finally let themselves finish.