Ads on Facebook

Okay, can someone please explain to me why Facebook thinks that I should date "Seniors"??? I keep getting this ad on the sidebar:

"Date Active Seniors -- Meet senior singles near you at seniorpeoplemeet online dating. Join free!"

I mean, WTF??? I know that I've gotten older, but I didn't think that I was actually in Senior Dating territory. At least not yet anyway. SHEESH!