probably genitals and sex and those kinds of words are just in a censor list.
Shame, I know, but you know some jerks out there will just put swear words in it and it unfortunately has the side-effect of people like yourself with perfectly good, in-context, bio's being left short.
Ya thankfully it wasn't too much of a hunt. It's just sad that they have to develop such limited means of filtering content. Oh well, thankfully i can use a little word magic and get it in now. At least it wasn't anything too major i had to change.