Before I go to bed

I mean, not to be gross or anything but I'm going to need an explanation of how someone can "lose" something inside their vagina. I bring this up because I happened across a post about someone "losing a tampon" in their vagina. This is not the first time I've heard of such things. As a teenager this used to freak me out. As an adult, I remain mystified. I mean, my vagina isn't some gaping black hole. The whole "lost in a vagina" thing sounds rather curiously like something a young teenage boy would come up with. And yet. It always seems to be girls bringing it up. Seriously, wtf.