Teflon is actually completely inert in your body. It's only a problem if it is heated to the point of giving out fumes at 260 celsius, and I hope that isn't happening in the bedroom...

They use telfon in all sorts of implants. I don't think there are really any safety concerns.

Teflon or PFOA is supposedly in everyone's blood already at least in the US and probably most western nations it's so pervasive.

https://en.wikipedia.org/wiki/Perfluorooctanoic_acid

If Teflon were anymore inert, it'd be a noble gas.