Actual conversation with Ana walking home from school.

Ana: Connie? *sticks out middle finger* Olivia says this is like cursing.
Me: Huh? Oh, yeah, it sorta is, don't do that.
Ana: But why? I mean, I'm only pointing at things.
Me: Yeah, but it's a little rude. Most people just use their point fingers, not their middle finger.
Ana: But...
Me: *sighs* See, Ana, because the middle finger is longer than the other fingers, some people think it's kinda like a penis, so they consider it rude to stick out your middle finger like that.
Ana: o.O ?????
Me: Yeah, I never said people were very smart or that this made sense.
Ana: *carefully holding down every finger but the ring finger* I could point like this!
Me: Yeah, I guess so, with your-
Ana: With my... my RING finger.
Me: Yeah, you could, that's fine. Most people use their point fingers.
Ana: Or I could use my pinkie. *demonstrates*
Me: Sure, you could do that. Most people just use their point fingers.
Ana: I guess I could use my thumb.
Me: Absolutely. Most people just use their point fingers.
Ana: People might think I'm giving them a thumb's up, though.