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Well, human beings apart from probably dolphins are the only ones to have sex for pleasure. The main purpose of having sex is to reproduce (scientifically speaking). So as long as there is an intercourse, viable sperm and viable egg there is a possibility of pregnancy. So even if you do not have the classical orgasm you can conceive.
Not all women have the classical orgasm. The idea is to enjoy. If you do, it is fine. There is no need to stress yourself out trying to achieve what someone else has and in the process losing all the pleasure you are receiving. This also does not mean that you are abnormal. Every woman enjoys sex in her own way. So relax!