Its a valid thread as far as I can tell.
As for what can be done with the beauty skills I don't know, i can't even afford to think about them let alone attempt them. In theory I guess you could change everything about your avatar with a probable exception of gender.
I am unsure of how you could train this skill, perhaps I could sell myself as a training dummy! I can see it now!
Back Alley beauty therapist, can't get any custom? Your surgery just doesn't quite cut it? You need Rent-a-dummy! For a low hourly fee this dummy will be completely yours to pratice all your latest technics on. Forget the drunks and winos, you won't need any more unwilling victems with Rent-a-dummy!