If your parents won't let you watch Hetalia, it is because they believe it to be in your best interest not to watch it. That being the case, it is extremely unlikely you can do anything to convince them to let you watch it.
You can try explaining why you're interested in watching Hetalia and how you believe you are mature enough to handle its content. Show that you understand the themes and can differentiate between fiction and reality. Discussing the show's educational value and how you can watch it responsibly may also help persuade them.
come out of the closet
you can't. it's way too scary for you.
Honestly, you can't convince them. Either they will let you or they won't.
if your parents wont let you get sponsored, well, id yell at em.
you say parents are going with
say please
I have the same question!
you ask them
make a deal with them and stick to it :)
tell them you want rats
be a good kid
Tell them its a Spanish trip and your parents are allowed to go !