The question of whether or not dentists can tell if someone has performed oral sex is a common one, and the answer is not entirely clear. There is some evidence to suggest that dentists may be able to see signs of oral sex, such as bruising or swelling of the or gums. However, these signs are not always present, and they can also be caused by other factors, such as trauma or infection. As a result, it is not possible to say for certain whether or not a dentist can tell if someone has performed oral sex.
Even if dentists could tell if someone had performed oral sex, it is unlikely that they would share this information with anyone else. Dentists are bound by patient confidentiality, which means that they are not allowed to disclose any information about their patients without their consent. This includes information about their sexual history.