I just assumed it was their version of the "Men" section of the site, like how shampoo comes in a black bottle and "electric rush" scent.
Though I suppose it could be the prelude to their version of Weenie Babies*.
It seems to be a section of the site for licensed properties that aren't necessarily appropriate for all ages. Most of it is like 13+ (Lord of the Rings, Marvel, Doctor Who, The Mandalorian, etc.)
The most "adult" stuff that I could find was the Gifts
section. Which included a rabbit drinking champagne in a shirt that says "Bring on the Bubbly", and various animals in Love Wins pride shirts. Also an animal in a "Don't Text Your Ex" shirt.
I think this is a mix of them making sure they keep as kid friendly an image as possible, by putting anything but a G rating behind a pop-up, while also being a bit cheeky and trying to get internet clicks by being faux scandalous.