Well,politeness has got nothing to do with it but my safety. If i care very much about my health, i will easily move to the available seat and spread my legs to make a show of i am too big for a single seat so that no one will entertain the idea of occupying the seat with me. :). One should be healthy and alive enough to care much about not wanting to offend a friend much less a stranger.

You guys are really in serious awkward situation over there.

It was an interesting read though, nice one. :).