Question about sexing

[FelanMoira]

I have seen on a couple sites and posts that so and so was "looped" male or female. How are Cresties sexed?

 

[leonut]

well male cresties have a bulge at the base of their tails and females don't.
see what i mean http://images.google.com/imgres?imgurl=http://www.aqua-terra-vita.com/Images/Lizards/SexingMaleCrestedGeckos.jpg&imgrefurl=http://www.aqua-terra-vita.com/CrestedGeckoWP/Sexing.html&h=252&w=360&sz=10&hl=en&start=2&um=1&tbnid=qeWu_Wb64leCtM:&tbnh=85&tbnw=121&prev=

 

[Koda]

They can also be pore sexed before a bulge is visible. Males will have pores visible with a loupe.