They look like a 15 years-old young boy and if we don't see hair, dress etc. they can be pretty "androginous" in nature, actually theatre has always worked on this ambiguity for centuries (I'm thinking about "the twelfth night" because I saw it recently).

The face on the left appears more "made up": not just the lips have "red" on it, but there appear to be some eye shadow around the eyes which is more evident than in the other picture.

Woman skin is generally (consciously or not) thought to be whiter than male skin for whatever reason.
That has probably also to do with skin generally (consciously or not) thought to be darker in older people.

That goes a long way back in history.

http://www.crystalinks.com/RomePainting2.jpg
http://images2.bridgemanart.com/cgi-...475/113284.jpg
http://calitreview.com/images/Pompeii_wall_painting.jpg