A bloke was having trouble having meaningful sex with his girlfriend.
A close friend suggested an interesting technique to improve matters.
Keep a blank starting pistol under the pillow and when things start to warm up, but appear to be going nowhere, fire the blank pistol.
A few days latter the bloke met up with his friendly advisor and when asked how the method had worked out he replied, “Things were just warming up so I reached under the pillow and let the blank pistol go off. My girlfriend bit the end of my knob off and the neighbour came running out of his house with his hands up!”