Not really sure why you’d ever want to go for BBFS, at least with a WL. If anything, BB with an ML would be less risky perhaps? I was once seeing this really cute little Thai ML, one of the sessions she started to put the tip in, and I let it go for about 10 seconds. She was on top and was pushing it deeper and deeper until we both regained our senses. Was freaked out for weeks but no way I would’ve done it if I didn’t feel like I trusted her (as in I wouldn’t have done it on my first sess with a girl and definitely not ever if they looked dirty or something.) This was probably my 5th or 6th session with her and she was so sexy and clean looking. Heaps of girls I wouldn’t have ever let it get that far so I suppose you can be careful to an extent but it’s always a lottery. Too much risk in the end