Simply repeating "big cock" ten times on a page isn't necessarily going to get you into trouble. However, if you have a text link "big cock" and it links to a page that's title "Big Cock" and there's "big cock" in the written content, the headers, and the ALT tags, then your page will probably be considered over optimized.
Isn't that the definition of a relative link? Now when did this type of seo become taboo?

I'm soooooo confused!