Okay. This is a serious issue I'd like to bring up with everyone.
If you are involved, forced or mentioned in inappropriate and/or explicit activity against your will, by another person/user, report their ads to the app/website/company and to someone you can trust or police. This is especially if you are underage, and being forced into something you don't want to do.
Just because your younger than that person or don't know them, it doesn't mean you shouldn't speak out against them. I have been involved in this same issue, and I don't want to call out anyone, but I have reported them. People like the police, teachers, parents and other adults say the same thing, but this is a serious issue. There are people on the internet who do this for their own pleasure, and it isn't right.
So please. If you are involved in such activity, report that person, and stop it before it gets out of hand.