What are some unique/fun persuasive speech topics?

[? la la la ?]

I'm looking for topics that are weird and it doesn't matter whether I agree with it or not.

So far I have

.Why it would be better to have a third arm rather than a third leg
.Why everyone should shave their head

I want to see if I can find any better topics. I'm going to come up with unusual reasons to prove my point.
Thanks