I am a 19 year old male dating a girl for 2 years. She was my first contact with sexual intercourse. Every time I have ever ejaculated I will experience stomach pains and severe diarrhea for hours after the act. Sometimes it will last for an entire day. I have to take Imodium to get the diarrhea to stop and the stomach pains to subside. It is ridiculous. Has ANYONE ever heard of this problem before? I am embarrassed to tell my doctor.