Call Girl
A high-priced prostitute who usually works outcall from a home or office as opposed to getting customers on the street or at a brothel.

Menstrual Cycle
The more-or-less monthly process during which the uterus is readied for implantation of a fertilized ovum. If fertilization does not occur the uterine lining is then shed.

Manwhore
A male prostitute.

Dihydrotestosterone
A hormone converted in males from testosterone that is responsible for the development of the external genitals of the male fetus.

Puberty
The stage of human development when the body becomes capable of reproduction.