My 5 year old sister has been doing weird things lately. So we were playing this game (appropriate for her age) and she said that a girl was hot. I was like? And then I was trying to take a nap and she started tickling me. But NOT where you would normally get tickled from.. down there.. ew.. and she was laughing like it was funny and I was screaming at her so much like what is wrong with her and stuff and she intended to tickle me there because of her laugh and what she was saying. So um I just don't want this to happen in her class. Is this normal or totally inappropriate? I don't think little 5 year old girls do these things to their own older sister. That's just gross. And she licks my best friend on her cheeks and likes hugging her. She has never done that before and I swear I DON'T know where she learns these things! I can't believe she would lick my best friend. PLAIN GROSS.

You need to talk to your parents about this and they need to calmly discuss it with her and explain what is inappropriate.

3 to 5 year olds lick each other, lick windows with their reflection and mirrors, I have to wash the mirrors in my school every day from the kiss or licks they do to the mirror ( and punching bags.

So I assume you have told your mom so she can talk about proper and not proper touching

This is a normal part of childhood sexual development. 5 year old children engage in some sexual "play" as well as just invasive play in general (poking, licking, kissing, biting, etc.) but they don't know what it means or what the boundaries are.

Saying, "She's hot" certainly doesn't mean that she thinks anyone is "hot" - she's repeating a phrase I must hear 100 times a day on TV and movies.

Talk to your parents so that she can learn about appropriate touch and personal boundaries and what's acceptable when she plays at school/with friends. Be mature and grown up -- instead of "eww" or "gross" explain to her that those aren't areas she should touch on another person (have her talk to mom or dad).