Never even considered doming up for a BS. Most are fairly benign, but some provides do push the pussy slide to the extremes.

Might seem a bit weird to the girl though, like your expecting sex or something close to sex so might turn some off.

Most girls idea of a BS is jumping on top for a few minutes and rubbing their tits over you. Asking for a condom at this point might turn her off a bit and creep her out. Totally depends on the girl though and their idea of what a BS is, so hard to gauge on a first visit.

Maybe just turn up with one on already so its not weird.