Sex - the one thing the human mind just can't avoid, no matter what. In one way or another, everybody is a pervert (except for the asexuals). Everything related to sexuality will be in this category. If you are on this site, there is a good chance you have never had sex because you are either a) a 13 year old boy b) autistic or c) a neckbeard, you also might be a furry in which case the chances that that has happened increse drasticly. You could also be a person who has a job where they sit in front of here computer all day which is completly neutural to that.
And stop snickering.