I think it more intended towards retention of energy.
Kunlun is related to Jing which comes from ones kidneys. Jing is depleted/used up by sexual releases. The more you can control and retain at end of release stronger your engery and expereience can be.
Max has said its ok if you are in a committed relationship to engage in activitites, but if you can learn Taoist or other methods of retention, they wil help. Not to mention ability to have multiple male orgasms. There are may book out there on this subject.