I have a bunch. Plus a bunch of other lizards.
That said, it really proves nothing- your father might be saying he thinks it is weird, but he might mean it isn't right for your situation for one reason or another (your budget, your time, your experience level, he might want to wait and see how the rest of your life comes along at this point before adding another chameleon for you to be responsible for, he might want to see if you eventually loose interest before making the commitment and investment in a second animal, his money might be involved in the chameleon, setup, food, etc, his time if he has to be responsible for making sure you keep things cared for and cleaned up, he may not want a zoo in his home). In the end, your father is responsible for his household and raising you the best he can and has the right to decide what is and isn't right for his home.
I don't think this thread is going to effect his decision making one way or the other- probably your best bet is to take super care of the one that you have, make sure all the other areas of your life are well covered (good grades, etc), try to earn some money to start saving for another one, and re-approach him again every few months to let him know you have a serious interest, and then gracefully accept his decision for a while even if it is no. Then repeat the process and try again. Maybe you already are doing everything I'm suggesting, in that case more patience, try rounding out your interest (breed some feeders, tweak your husbandry, read some books, etc) to keep your spirits up, and then ask again later.
I've got kids myself.
Good luck with it.