Knowledge of D~s lifestyle.
I find regulars/FWB more interesting then casual encounters. ALSO AND THIS IS A BIGGIE, he nudist women in Norway is a voyeur, and she likes to play with men, he's game. This does not take up every female fuck buddy in Croydon weekend and all our free time- many other important things in life or playing games. Just because it's fun, it doesn't mean we want to bowl all the time.