Can I use the term facebook in advertising?

[Bianca]

I am making a leaflet for my horse lovers social networking site i have set up. I was thinking of using the sentence:
"think facebook, but exclusively for people who love horses"
Am I allowed to legally use the term facebook?

I am not trying to pretend to be facebook, just get across the concept of what my site is about.

[wtstephens4]

If you were to say 'see us on facebook' it is ethically OK. People know what social networking is, so feel free to use that term. Or 'connecting people who love horses'