i was at a friend's the other day and told her i was thirsty. she said ok there's stuff in the fridge. well she went to the bathroom, i went and opened the fridge. all of a sudden, she comes running out of the bathroom screaming and slams the refrigerator door shut as i was opening it. long story short, i noticed something in her fridge that said something like "vaginal o-ring", or something along those lines. i didn't ask her about it and just played it off like i didn't see anything being that it was obvious she didn't want me to see it, but my question is, what the hell is an o-ring? i've googled it a few times and can't find the answer. anyone wanna help me out? (i have a feeling i'm going to regret knowing this)