Mutual masterbation is when two or more males get together in a room and masterbate infront of each other. They may get naked and sit in a cirle and masterbate the person to their left or they may just all masterbate themselfs at the same time. There are many variations.
When two friends meet in a room and they strip off and then masterbate each other until they ejaculate, this is an example of mutual masterbation.
by Jonathon C June 16, 2006