Oo WHAT? My computer doesn't show that!
My monitor this the advertise pron also not visible.
Is it just completely random??
No, it isn't actually random. It mainly depend on the web browser and its settings. Addons/plugins also can affect this.
I am pretty sure that I dont have porn addons in my chrome!
Actually, the addons supposed to affect this block unwanted contents, like ads, and this porn shit apparently is an ad for a porn website.