Rules of Etiquette: no. 708 in an occasional series

Caught short on a crowded open boat in the middle of a rainstorm, this chap does the only sensible thing and has a sly pee into an empty tube of Pringles, watched by his slutty-looking girlfriend:

His mate suddenly realises what's happening and, in the best tradition of best mates, draws maximum attention to it:

Then, in a startling case of "monkey see, monkey do", he also has a pee in the Pringles container:

And suddenly the girl in the tarty red leather jacket catches on and feigns appalled shock:

I'm actually more curious about the intense way  the boy in the red top is staring at his mate's cock.

What a sweet little sequence. Immensely cheering.