as a baby their bites wont hurt but as they get bigger it could. as far as sexing, it is hard to tell as a baby whether you have a boy or a girl. That dark throat method applies to pacmans that are about 2 inches wide and bigger. Its still too hard to tell as babies. There is also another method that you may find on the internet that says that you can sex a baby by spraying it with water (pissing it off). If it croaks when it leaps at you its a male. That method is false. Females croak too when threatened. I was told about these things from a pacman breeder so your best bet would be to name your frog a boy and girl name