Its All in the Timing

To add variety to my masturbation sessions I sometimes put on a sex video and wind the tape forward to where the man ejaculates. Then, after resetting the counter to zero I rewind the tape back about 20 minutes and start playing it back. I then begin masturbating and try to time my climax to coincide with the man in the video. The fun is in trying to cum at the same moment. Sometimes I overshoot and sometimes I undershoot (pun intended).