system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why's there still a "share" button for internet porn videos despite there being zero demand for it?
gpt
Three possibilities:

1) Someone out there actually uses the porn sharing function, so websites continue to use it.

2) Its a default option in the web video program that porn sites use, and removing it would cause some issues with the playback.

3) Web developers have a weird sense of humor, and have programmed it in the hopes that people click it on accident.