Let's Say That We Were to Become Unobtrusive Observers of a Couple

Multiple Choice

Let's say that we were to become unobtrusive observers of a couple engaged in sexual stimulation.We notice the frenulum of a male is being stimulated by his partner using a teasing technique which brings him close to orgasm.This technique is done repeatedly.We are probably observing

A) a heterosexual couple who do not have children.
B) a heterosexual couple who do have children.
C) a gay couple.
D) a lesbian couple.