Why are there so many porn images in comment sections recently?

I’ve noticed within the last couple of days that almost every comment section under a popular tiktok will be flooded with pornography (in particular those Miku x Teto futa ones and a LOT of BJ drawings).

Just… why? Why now? Why did this start and why are people sending unsolicited porn on a site where there’s children? If I didn’t have enough reason to avoid the comment section I sure do now…