The never washed jacket that smells like wet dog, beer, smoke, food, carpet, hair and everything else in your house you never wash or clean doesn't smell attractive. It smells like a stale rotted rug that's been trampled on by muddy, pissy, gigantic man shoes left in the corner of a bar for a month.
Please wash that shit for the sake of us that have to sit behind you.
I know it's your coolest, favorite, most raddest jacket.
But it's okay.
It won't take you that much longer to wash your regular loads, if you ever do wash your clothes. It won't cost you much more and use much more water.
Just wash it, like once a month.
Or start with once a year if its too much for you to deal with.