Being a "Teenager"

So recently I've noticed that I've started swearing more (not the f bomb or anything but like damn, bitch, hell) and thinking about sex a ton. The thing is, I'm not like this typically, and I feel bad for doing it. I don't want to be a stereotypical "teenager"(swear a lot, hookup at 
parties) , I just want to work on being a better person, but stay true to  
myself. Anyone