Its a community called Daddy Dom-Little girl (there's also Mommy Dom - Little Boy sect), that was introduced into popularity because of the communiy being embedded on Tumblr, and 14-year old girls being socialised into it.
Its largely role play and domination sex, with very clear signs of integrated abuse, alongside "aftercare" for post abuse. Essentially the "Daddy Dom" is supposed to get sexual satisfaction from the "little" dressing in young girl's clothes (bright, pink, frilly), and from having total physical domination, even through safe words.
I've dated two women that were really into it, and its pretty disgusting when you think deeply about it.
Quite a few of the Dom-Little pairings are White men and Black women, which means there's quite a bit of race-play that you can find.
The deeper you get into BDSM, the grosser it is

The surface level stuff (spanking, biting, domination-lite) can be fun and casual, but quite a bit of the deeper stuff clearly comes from a place of anger and trauma