From another 17 year old, it’s really not worth moving for this guy, who knows where you’ll be in 10 or even 5 years, you will probably want completely different things by the time you are in your 20’s.
I think it depends on context. There’s a difference between purposely trying to be provocative/thirst trap stuff and a woman just existing and not doing anything sexual, but her body is sexualised anyway.
Idk I use Snapchat but I’m in my late teens so I don’t think it’s that weird for me. I think anyone that uses Snapchat over the age of 25 is weird though.