She wasn't able to get the snake to evert and see what's what then Jen? I know when I recently popped our yearling male, Malachi, before his vent could fully open he was expressing a thick white substance all over my thumb. I can only assume what that is but I'm guessing that's the good stuff as he's a confirmed and sexually mature male. I wouldn't say though that your friend just assume hers is a male by that...either get it properly popped or probed just to confirm her suspicions.