masturbation using table corner?

i discovered this form of masterbation when I was a kid and accidentally rubbed myself against the edge of a sofa. Ever since then I've been using this form of masterbation. I rub myself on the edge of a table and hold on to the sides while i raise my feet from the ground and it feels amazing. i was wondering if anyone else does this too?? and also do you think the corner of the table being pressed up against my vagina can harm my vagina? help pls