If you don't see hemipenes, you could be doing it wrong and it could still be a male.
I have a male, and I finally popped him successfully yesterday; if it wasn't for me knowing he was a male I would've though he was a she.
MH
Who the hell is Pat?
"Pattimuss doesn't run, he prances most delicately, like a beautiful but sad fairy, winged and capped, curly toed shoes on each foot, dancing on dewdrops while lazy crickets play soft music for him to keep time by...." - Wes