What makes the person go 'Yergggghhhhaaaarghh' when aimed at their bum?

What would you aim and who would you do this to?

― Mr Noodles (Mr Noodles), Tuesday, 1 April 2003 16:52 (twenty-one years ago) link

I like my question better, even if that little troll came up with the title.

― Mr Noodles (Mr Noodles), Tuesday, 1 April 2003 16:54 (twenty-one years ago) link

Prince's "Let's Pretend We're Married", obv.

― nickalicious (nickalicious), Tuesday, 1 April 2003 16:56 (twenty-one years ago) link