I think the amount of masturbation depends on the woman. I masturbate sometimes 3 or more times a day, sometimes not at all for weeks, just depends on my mood, how much weed I smoked etc. As for the fisting question, I have had up to four fingers in me at a time, but I think it depends on how big your fist is, and how big her pussy is. I wouldn't care for a fist in me, prefer the real thing or a dildo.