On an unrelated note, if Jack Nicholson was about, oh, 20 years younger, he'd give Hugh Jackman a big run for his money in terms of Wolverine.
By an interesting coincidence, failure to have washed one's ass does figure into one scene of the horror novella I'm writing.
I don't recall Nicholson ever showing a similar athletic capability. And don't give me any bullshit about him riding a motorcycle in Easy Rider.
I wash my ass at least once a day, often twice. I hereby declare that the universal standard for personal hygiene. Either you smell freshly showered at all times, or you will be assumed that you are a transient meth head and treated accordingly.