I had the opposite, my male was a female! I was happy because I paid less for my male albino! My friends male was very hard to pop! I thought he was going to have the same problem as me but we took him to the local reptile store and he popped him and he was a "shy male" the guy said! He also showed us how to pop! It is easy to do and you don't need alot of pressure, just enough to cause it to open!