First make your girlfriend do a sexy stripper dance. Then, when you get to the peak of excitement, jump up, thump your chest, swing your arms and spit copius amounts of frothy saliva, all the while making baboon-like sounds. Then pick her up and throw her over your shoulder and carry her to your tree house.
"How did you get on with that new bird from the club??"
"It's not going to work out - she called the police after I gave her the RABID BABOON"
The moment in the relationship when a girl changes her mind and doesn't want sex anymore - but when she's tied to the chair she realises there is fuck all she can do about it, except go up and down and some loop-the-loops.
She realised that she didn't want to through with the one night stand anymore, but she had already got on the Love Rollercoaster and he had starpped her inan taken her tokens.