Copypasta:

"It comes from 4chan boards. They have a lot of porn boards there, and newfags always ask for a "source" to spank it to when they find a .gif they like. So moot one day just decides to have a laugh, and filters every use of the word source, and replaces it with the word sauce. So the pornfags thought it was better to be on the giving end of the joke, so even after moot killed the filter, people kept asking for "the sauce." 4chan is one of the larger forums on the net, with a metric fuckton of visitors, and quite a few people troll the porn boards. Well, actually, almost everybody does at some point, its just easier."

The more you know 🤓🤓🤓