For most bodies the barycenter, while not the same as the center of mass, is still inside the sun. This one isn’t, making it notable

There’s a lot of stuff out there that isn’t body safe. Never been in a physical store but have gotten a lot of stuff online and had to throw out the toys I got first because they were TPE. They weren’t even marketed as novelties, they were being sold for body use, even though they weren’t safe. There’s no legislation preventing it, it’s perfectly legal to sell unsafe toys. If your toy isn’t silicone, then DEFINITELY don’t use it analy. Even then, unless it’s specified medical grade or platinum-cure, you’re rolling the dice on what’s actually in it. If you have a silicone toy you’re unsure of, there’s ways to verify it.

Yo don’t actually put those in your butt, they’re not made of body safe materials and will give you ass cancer. Don’t use TPU, TPE, PVC, or tin-cure silicone in your butt. It’s literally made to absorb stuff and putting carcinogens in it is a bad idea. Look for medical grade or platinum-cure silicone.