To Bow or Not to Bow?

Ok, so I've been a big fan of bows since I was kid.  They are just fun, carefree, and young. Which leads me to my conundrum. How old is too old to wear bows in your hair?

When I started college I retired my bows and ribbons thinking that it was childish. But then everyone started wearing bows again! So, I jumped on board and started sporting bows and bow-bands.  Now that I'm a quasi-adult I still want to wear bows but I'm left with the feeling that they are again too childish for my age.

So, I ask you. How old is too old to wear bows? Does it depend on the occasion? Does it depend on the bow? Let me know your thoughts!