how should a male look popped?

[SlitherinSisters]

There should be two little nubs that may be flesh-colored or pink. Those are the scent glands, and both sexes have them. Males will have two additional red or purple dots when you pop, even if you don't evert the hemipenes completely.

That's what I go by. If I see dark red or purple it's a male. I don't really like to pop the entire hemipene out. Once you do it a lot you'll be able to tell a lot better. If you pop and see dark red/purple you're going to see the same thing when you pop the whole thing out, just bigger. Hatchlings are much easier to practice with and I have popped them all the way out just to be sure my theory is right.