You can extend underwear wear-time by up to seven days by simply wearing them back-to-front

When I was little, my mum always used to tell me that I should wear clean underpants 'in case I was run over crossing the road'. This always confused me; I mean, there I'd be twitching and bleeding my last, and rather than being shocked by my horrible, mangled injuries people would be saying: "Tsk. He was wearing those same Spiderman undies yesterday, the little guttersnipe." I don't know about you, but wearing clean underpants would be the last thing on my mind in that situation.
Or maybe it wouldn't. Who knows what the brain does in its last seconds?

Anyway, last night the real reason for the clean underwear/crossing the road rule struck me. Plainly paramedics are perverts who supplement their wages by selling the used pants of traffic fatalities on ebay to Japanese deviants.
It's the only explaination that makes sense.