Looking back on an encounter a couple of days ago I'm almost positive my provider put the condom on inside out. Then I realized there are probably only a few reasons why that happened.
1) It was lubricated and she did not want to taste the lubricant because she was giving a CBJ.
2) She was really tired and not paying attention at all.
3) She is new and didn't really know the right way to put it on.
In any case, it had to be inside out because I could not roll it down normally despite several attempts. Then I got to thinking this has probably happened occasionally before but I never thought about it because I always assumed it was put on correctly.
So, gentleman, the moral of the story is: if it's not rolled all the way down, start over the right way with a new one!