I use 2 hands...surprise. I use one on my shaft and one playing with my balls and ass. Sometimes 2 on my shaft. I use a lot of lube and sometimes a dirty pic. No adult films.
I have. I've masturbated with and in front of probably over 200 people. I adore being watched and performing for others viewing pleasure. It doesn't matter to me if it's guys or girls watching, if there are eyes on my cock, i'm happy.