actually, you kind of have to be careful with translucency and skin.  translucency is effectively back scattering, and most of what skin shows is front scattering.  two different phenomena.  Poser does need both, but if you're using a tool with both, like D|S 3 Advanced, you need to be careful about volume.  even if the application can work translucence volumetrically, you need to learn to control its scale properly.  ears, hands, nose should show some translucence in very particular situations. and the rest of the skin shouldn't show any translucence unless you're doing a really fine close-up and the lighting can show you the thickness of the person's skin.  usually in the face, or in older people.

lots of renderers do not implement any type of volumetrics with their translucence, and it's really only designed for items with approximately no width.  like lampshades, curtains, leaves, etc.  i have no clue how Carrara's translucency works, but judging by the flatness of most skin i've seen out of it, even very realistic works, you might l want to experiment with the much more important SSS first if it has it.

Translucency in Poser is crazy.