Today I popped my BP for the first time, and I think it's a female. (Her tail slopes off pretty sharply after the cloaca, so I had suspected she was female.) My question is, how far do you have to push open the vent before the [hypothetical] hemipenes emerge? What should I look for?

I was following this site and I have also watched someone pop a female snake before. Just want to be sure. The site says sometimes the scent glands will be everted on a female, but all I saw was some reddish fleshy stuff, and I couldn't really tell if it was the scent glands.