I have two males and they both bite. They will be having a really good time in a playful mood and running all over my legs, then take a chunk out of me. I have heard neutering really helps, but I am not sure the details of how safe etc it is for them. Also, be VERY careful when you blow on them. They are smart and will remember your face and that you just blew at them.
Here is what works for me. When mine bite, I go 'PSSST' fairly loud and place (NOT push, hit or smack) my finger on the back of their head. They cant see whose finger it is but the noise and the touch (again NOT hit) startles them to stop. NEVER hit your glider. They dont make noise when they are hurt so you wont know that you are actually hurting the poor thing.