Presumably ‘commit’ would have a high association with either git or self harm.

I didn't think marriage was that bad but point taken!

Yeah, they were joking.

I didn’t get the joke but I think it could be interpreted as the poster pointing out that commit is used in other places too, so it could be interpreted in two ways legitimately and sometimes sarcasm doesn’t convey in line. I like the joke now that I see it, assuming it WAS a joke.

It was a joke