That sounds like someone being mean. Would they find it funny to steal their grandfather's support cane? Or someone's hearing aids?

That’s not right. It’s basically bullying I know from experience because someone at school did that to me, they weren’t even actually my friend but it’s not right

Can't have a partner stealing your glasses if you're single, am I right!? Lol

Bin her

That’s 100% not ok.

Nah. Also, if anyone ever did try that, or taking my mobility aids, or anything disability related from anyone, I'd dump them. It shows a complete lack of respect and willingness to treat you however they like for their own amusement.

Oooh people in high school stopped doing this to me when I started swinging hardback Harry Potter books at them for doing it.

Would this person think it was funny to steal a prosthetic leg from someone or kick a wheelchair out from under someone?

That's not a partner.