Sexual intercourse is generally viewed as pleasurable and necessary for procreation. But there are individuals who find female genitalia to be a source of profound fear, known as Kolpophobia.
It may be possible to think that some men might fear female genitalia because it is different from their own. New doctors for instance discover a fear of female genitals when assigned in obstetrics, sometimes leading to a phobic response. Women on the other hand, self-mutilate when they fear their own genitals, resulting to scarring and pain during urination. Individuals who have kolpophobia include tremors, avoidance, shortness of breath, increased heart rate, nausea, disgust and anger.
Those with this fear will be overly reluctant to be in close proximity to women. The idea of so many who have the features they fear can cause significant panic attacks and may result in extreme social anxiety.
To overcome kolpophobia, one should consult a professional. The physician can help understand the actual use and benefits of the female genitalia while the therapist can help come to terms with the fear you are experiencing. Knowledge and retraining can most help when coming to terms.