One who views the sexual expression
of oneself as frightening or offensive, such people have generally be trained since childhood to consider sex unnatural and different from other human
behaviors i.e. eating they will typically fight tooth and nail
these conventions even
in the face of logic.
Yep, a hornophobe. You've met one, you're probably thinking of him.her right now.
The opposite of Jim's dad from American Pie, perhaps.