one has a penis
If it has a spot on its bottom it's a boy if not a girl
I think by looking at it's scales.
size and color
there are only girl whip tail lizards
hi you tell a boy from a girl lizard by the thickness of the tail the boys tail are more thick than girls
usally the girl lizard is bigger than the boy
usaully the girl lizards are bigger than the boy.
sam, alex, bobby, robin
You do not tell if it is a boy or a girl by looking at it's color, the color changing green means the lizard is happy and if it is brown it means it is stressed.
Lizards have scales, and boys and girls usually have hair on their heads, and smooth skin.
Tell me where you come from and I tell you who you are.
I suggest starting off with listing off all the reasons why your friends or why you like her, and tell her shes pretty. If she laughs at you or is rude then just brush it off your shoulders back off and find a new girl that is into you.