Example of this wonderful work (not exactly a package) are:

Dragon Ink - Ardeth for David & Hiro (Daz3d)

and

Beautiful Boy Rebirth from Samildanach

Give them hair and some fantasy QUALITY clothing and props and then you have that "gem" you told about.

Second skin clothing, as svdl told, is OK for underwear (but stupid on males if this has not a right  "something under this" shape), but rest of clothing looks dull and useless just painted over the skin!. :-(