Jacob, a 30-year-old man, cannot ejaculate during sexual intercourse despite adequate sexual stimulation and the desire to experience ejaculation. However, when his partner gives an oral stimulation, he is able to ejaculate. He consults a sexologist, and the sexologist is most likely to diagnose his sexual difficulty as ________.

A) premature ejaculation
B) dyspareunia
C) delayed ejaculation
D) priapism

Delayed Ejaculation is a condition where a man cannot ejaculate during sexual intercourse despite adequate stimulation and the desire to experience ejaculation. However, he may be able to ejaculate via other forms of stimulation, such as oral stimulation. Premature Ejaculation is a condition where a man ejaculates too early, before he or his partner is ready for it. Dyspareunia is pain during intercourse. Priapism is a persistent and painful erection that lasts for more than four hours. None of these conditions match Jacob's symptoms except delayed ejaculation.