I have had this but it was unexpected.
Of course at the time your not exactly thinking with your head (You know the head I mean)
It was ages afterwards when I was seeing a different SP at a different place. I remembered how it felt and asked about the possibility of a pussy slide in the future, if I brought a rubber.
I was given the nod.
Then of course, as often happens. I never bloody saw her again.
Personally…….. if you’re after this kind of thing. Go with a rubber. As has been mentioned. No protection it is borderline BB.