As others have said, there are things that are beautiful but not cool. "Coffee table" wood facings on your bass is one.
But things like singlecut horns that go up to the 12th fret, I don't get it, but if I'm beating the crap out of the 14th fret E on the D string sometimes I want to grip it, thumb over board like I'm wielding a bat.
Dual headed fretless/fretted, not cool.
But at the end of the day, cool is what you do with it. If you sit there gently playing Barry Manilow stuff then automatically nothing you're doing is cool.