Both characters remained fully clothed and there were no genital shots. But this was still the most explicit sexual content Wildenborg had seen in a video game. “It was at this point I decided to release the patch to the public,” he says. “I tossed the name 'Hot Coffee' on the file, based on the fact that the girlfriends would ask CJ in for some 'coffee' as a euphemism for sex. Hot Coffee was the first modification for San Andreas.” - The history of Grand Theft Auto's infamous "Hot Coffee" mod.
The ESRB changes GTA: San Andreas rating from "M" (Mature) to "AO" (Adults Only). This following a brief media blitz surrounding the "Hot Coffee" mod, a fan-made workaround that allows players to access what amounts to a "dry humping" minigame in the code which was not made directly available in the game. In the PC version, the mod adds nude models. [more inside]