if it's a regular, I would ask during conversation,
Some say they do, some don't
I've just said it's for extra fun. With one WL she opened the bottom draw and wacko, it was like a toy shop, she dragged out this huge dildo and said lets go, (scared the crap out of me as I wasn't asking for my pleasure) then she goes kidding, and gets out a little bullet, PHEW
Both of us enjoyed the sensation at the same time because you can feel it though her body
Felt good, came quicker (fail) Learnt from mistake..