Geeks Vs. Nerds

I had a conversation with a co-worker the other day that got me thinking. I'm not sure how we got on the topic, but he was adamant that he was a geek and not a nerd. I disagreed because the word "geek" has negative connotations for me--I can't help but think of disgusting carnival acts where some poor chicken gets its head bitten off. For me, a nerd is someone who lacks social skills but is smart and interesting and I find that kinda sexy. A geek is socially awkward too, but is also weird and icky. Liam disagreed and said the complete opposite is true. So I consulted my favourite online dictionary but now the waters seem only muddier because the words appear to be interchangeable:

nerd
–noun Slang.

1.	a stupid, irritating, ineffectual, or unattractive person.

2.	an intelligent but single-minded person obsessed with a nonsocial hobby or pursuit: a computer nerd.

geek
–noun

1.	a peculiar or otherwise dislikable person, esp. one who is perceived to be overly intellectual.

2.	a computer expert or enthusiast (a term of pride as self-reference, but often considered offensive when used by outsiders.)

3.	a carnival performer who performs sensationally morbid or disgusting acts, as biting off the head of a live chicken.

Hey, at least I knew about the chicken part.

So, is there a consensus on this? Am I the only one who thinks geek=bad, nerd=good?