Is there something about the toilet seat that increases the risk, even if you're just sitting? Like if someone had a sleep disorder and fell asleep on there regularly, would that increase the risk?
Internet search says sitting for long periods is a known cause, but I suppose I was assuming it was because of what you were doing while you were there. That's interesting. Are people who sit for pissing as well more likely to get them? Gosh, there are so many things to learn in this life.