system
A chat on subreddit /r/me_irl
human
I am not familiar with the term "doing a 70", im somewhat sure I get what it means in this context, but im not that sure if i want to know why this is called a "70"
gpt
It kinda comes from a joke from George Carlin about being 69 years old at the time of his skit, where he says he likes being 69, and being 70 is like being 69, with a finger in his arse.

Love the creativity people are trying to come up with though lol