Grunge, by his very nature, had a reputation... or rather, a preconception of him... for being morose and moody and generally unable to take a joke.
This preconception, albeit somewhat justified, was also slightly unfair. His bands had loved a joke, they'd HAD to have a sense of humour to lacerate the lofty and poke gentle and subtle (and sometimes not so subtle) fun at the media and the consumers. It filtered into their albums, puns and sidelong glances at serious subjects with a quirk of a smile hidden under faux-sincere eyes.
Couldn't be THAT miserable ALL the time after all. Look at Morrissey and the Smiths. Exactly.
Grunge knew exactly who the stranger on the bench was. His gang, when not doomed to destroy themselves, were destined to enjoy old age still smoking out of a hole in their throats.
And so, it was with this wicked sense of humour that he went up to his fellow god, held out a virgin cigarette and asked, "Gotta light?"