Can anyone explain me why is this appearing on my site?

Hey everyone.
I read some article that it says you can check some of your things about your this on your site at ahrefs.com. So I tried to check my site out but suddenly some adult thingy name appeared on my thing. I was like whaat???
My site is about fitness thingy. and Ive never typed or putted that kind of things into my site. I am still wondering why is this happening?
im including the screenshot with this post. The blurred ones are my site's name.
and those things are written in…
Can anyone explain me why is this appearing on my site?

See original post by todachange