Well, sometimes, it takes less than classy reasons to hear and love a classic. If I'm being perfectly honest here, I've first learned about "You can't always get what you want" (Rolling Stones) from the first episode of Dr House
And I owe it to you and
I'm Not Thea Lundgren! from a discussion in another thread (can't remember which) to have listened to "Come on Eileen" for the first time (and love it since).
So you see, what's important is not that people first heard the song in a stupid show, it's that this song, like so many, is immortal, and it won't cheapen your twinsy's and your memories of it