Some are good at hiding it.
Most Helpful Guy
First, check if he is a guy, if he is, you have your answer. A large number of girls are pervs too. They hide it jusy as well.
For that matter, are you sure you are not a perv yourself? You might be, given you logged onto the internet and started asking questions about pervs.0
Most Helpful Girl
They want sexual related stuff, make a lot of pervy jokes etc0