Well, considering that the average vagina is about 10 cm deep, and the length of the average erect penis is about 13 cm, yes, it is definitely possible. However, it should be emphasized that the vagina grows during sexual arousal (only a few people know that!), So the penis can never penetrate your cervix. In other words, “Nothing bad will happen.” This was said by Dr. Sophia Yen, director and one of the founders of Pandia Health, a service for the delivery of birth control pills and a professor in the Department of Medicine at Stanford University. Moreover, some women experience so-called vaginal orgasms precisely because of the stimulation of the cervix. On the other hand, if you feel that penetrating sex is causing you pain because of this, ask your partner to pay attention to it and try to be gentler, or try a pose that allows less penetration (e.g., missionary). If you notice bleeding, consult a doctor immediately.