The other morning I spent an great time with my ATF.  For more than 90 minutes she took it nonstop in all three holes.  She said she had five 'big cums' and I believe her.  Unfortunately for me I can only get it off only once these days.  When finished I was  completely exhausted and was only semi conscious while she then did an energetic massage. She made it clear, however, she was ready for more.   When I got home I had to nap for two hours to get some reasonable strength back.  

How do young (and not so young) girls keep up supercharged energy levels during extended sex?  Maybe the prolonged gangbangs on internet porn are closer to the norm (??)  

How long can a girl go on while having multiple organisms?