Synesthesia? Interesting, didn't know there was a name for it!
I've always associated numbers with tastes.
0 = soup
1 = strawberries
2 = grapes
3 = peaches or plums
4 = cheese or honey
5 = tomatoes
6 = spaghetti
7 = cucumbers or pears
8 = eggs
9 = macaroni
And music styles too.
classical = tomato soup
jazz = oranges
pop = yogurt
rock = Coca-Cola