Sometimes a theme presents itself...

Well, this month appears to be all about arse. No problem i hear you say? Goodo then:

Donkey Punch

The Donkey Punch is when you're engaged in anal sex and as you're about to ejaculate, you punch your partner in the back of the head and the anal cavity tightens making the orgasm more powerful.
e.g. I donkey punched Meredith last night, and it was awesome

(thank you urbandictionary.com)

And please remember: i don't invent this stuff, someone already beat me to it!