thepathoma:
It's Just another case of Vaginismus (also called Penis Captivus). About 5-10 cases are reported yearly in our continent. It's simply caused by Involuntary Contraction of the vaginal wall muscles (majorly the Pubococcygeeus muscle) against an erected penis, impeding relaxation and drainage of blood off the penis, mostly as a result of Anxiety, resistance or first-time sex on the side of the woman.

Treatment is simple: Both partners should calm down, and give the vaginal muscles some time to relax. Usually about 30mins-2hrs is required for best results. Do not panic. It should resolve in that time frame. If not, call an Ambulance (not the neighbours o). We mostly give a drug called Diazepam to assist the woman vaginal wall muscles relax.

Thanks for being enlightened. Yes, I'm an online Doctor. For any medical consult, feel free to hook me with your personal message. Live Right.