I have never been able to have an orgasm through sexual intercourse. Can there be anything that caused this? I have no past traumas.

Normal Sex. This is not only common it is one of the biggest secrets that shouldn't be a secret. Many couples have to learn to incorporate clitoral stimulation with intercourse. Some females prefer to keep this role but many of their partners love being able to please their female partner. It is all about communication and practice. I often recommend getting a guide book to sex to figure this stuff out.