You don't need to tell your Dr. if you have gangbangs! They wouldn't write that in a chart anyway. You should say you are non-monogamous or have multiple partners. I recently went to a new gyn. On the form in the birth control section I just checked vasectomy and wrote husband above it and checked condoms and wrote boyfriends above it. She didn't bat an eye, didn't ask any questions except whether I wanted std testing. As medical professionals we're trained to be professional about any sexual situation. Half the nurses in the office are probably swingers anyway! We've met tons of nurses, dr's, OT's, PT's, RT's, etc.