You cannot ejaculate without an orgasm (or, climax). There is nothing known as a real or false climax, so I guess you just want to know how to achieve a climax while having sex. Well, for a man that is fairly simple. An orgasm is reached when the skin on the penis is rubbed causing a friction which is received by the many sensitive nerve cells present in the penis that finally reaches a peak resulting in the ejection of semen. When you insert your penis into a vagina, all you have to do is to move it in a piston-like fashion i.e. an in-and-out motion. Soon you will reach your climax. Enjoy!!!