My (24M) Girlfriend (27F) is throwing used tampons under our bed

Well that's still really not conclusive. If stuff was randomly rolling around under the bed from the dog, it would naturally get shoved to the back every time you got something out then shoved the tub back in. You could go a long time without noticing, because normally I doubt you or GF really examine under the bed when you pull out a storage bin.

Anyway, I would just tell your GF that FYI you made a gross discovery that the dog is apparently stealing her tampons and hiding them under the bed and to keep an eye out for it. That way, even if it wasn't really the dog it still solves the problem because if it was her for some weird reason, that still puts her on notice to stop doing it.

/r/relationships Thread Parent