Thea

Lara's lips had been rich and fine, sensitive and curious, tender, eager, hungry; the lips of Vika were maddening; I recalled those lips, full and red, pouting, defiant, scornful, scarlet with a slave girl's challenge to my blood; I wondered if Vika might be a bred slave, a Passion Slave, one of those girls bred for beauty and passion over generations by the zealous owners of the great Slave Houses of Ar, for lips such as Vika's were a feature often bred into Passion Slaves; they were lips formed for the kiss of a master.
Priest-Kings of Gor Book 3 Page 53