While I was in the Navy, I read a report (in one of the Summary of Mishaps messages, IIRC) that an all-male ship that had already been out to sea for quite a few weeks straight, no port visits, suddenly developed an STD outbreak: a dozen or two sailors contracted the same STD. They eventually traced it to a sex doll that one of the sailors snuck aboard and, as an all-male crew long out to sea is want to do, shared.
Moral: Some things just should not be shared.
... Ew.
If you had posted that on "
You laugh you lose (may be NSFW)" over in Off Topic, I would have instantly lost.