Sarmassophobia fear of dating
"Coitophobia" is derived from the Latin "coitus," which means "to come together." feces.
It's not unusual for people to disike the sound of their own voice when listening to a recording of it, however, that's not a phobia or fear, just a basic insecurity. This one is on the Phobia List of Top 10 most popular phobias.
So this phobia should be defined as the fear of opposites.