How do you make your sims talk without moving their body in sims 3?

I noticed in sims 2 movies on youtube, people can make their sims move their mouths without moving the rest of the sims body. How do you do this for the sims 3? I already know for sims 2.How do you make your sims talk without moving their body in sims 3?
Dont think u can, just buy a catHow do you make your sims talk without moving their body in sims 3?
Well you have to use a pose box available for the sims 3 there might be one here : http://www.sims3cri.com/en/guide-tips/ch鈥?/a> and if that doesn't work use this one http://www.google.co.uk/search?gcx=w%26amp;sou鈥?/a> and there in a pose and then your sims might try and talk to each other or you go on the sim that is doing the pose and click on the other sim and they talk but they stay in the pose just there mouth moves :D hope this helps :)