Jenny, you may want to go for a bodybuilder then. Its is very much like drgoodbody described. My ex-girlfriend used to ask me to stop after 2-3 hours once she had already had several orgasims and was getting sore. Usually guys who juice and train hard have a much high labido and are in enough shape to have the stamina. Either you can cum several times, thus last a long time, or you just can't cum so go over an hour anyways. Just a suggestion for you.