Depends on why he's against it. Start my being extremely responsible. Then show him that you know how to take care of a piercing. Show him websites that you've looked at, articles etc. If he's afraid of you looking trashy or something, show him pictures of pretty people with their nose pierced. You can also show him pictures of the different types of jewelery esp. hider jewelry or retainers. It'd also be a good idea to take him to the piercing shop beforehand. The piercer could give your dad info on the piercing and your dad can see just how clean the shop is so he won't worry about infections/diseases. Good luck!
Tell him that you will take care of it and viola!
No need 2. Twitter is useless.
Say "Dad I have a new friend and she/he asked if I could go to there house?"
convince*
Cut his head off
You could tell his that it's your body, not his.
In a few years you'll be 18 and can just let them know.
My dad has a PS3 that he virtually never uses. And i have no other game systems. He keeps the PS3 in his room, how can I convince him to move it to the living room so everybody can enjoy it?
Just keep asking her about it. It actually took me three years to convince my mom and dad to let me get my bellybutton pierced.
You can't. Or you could possibly find a hypo-allergenic cat.
You can barter with your dad to let you take your frog over winter break. Offer to do chores or other things to be able to take frog with you.
Nothing. Your Mom's decision is based on your Dad's behavior, not your behavior. Therefore, nothing you do or say is of any consequence to the situation.