Dr. Berman's final question is one of the most important questions any teen couple must face—are you absolutely sure that neither of you have been with anyone else sexually? "Meaning orally, any other way," Dr. Berman says. "If you have, then you would both need to get tested for sexually transmitted diseases before you had sex."

Both Courtney and Pierce say they are absolutely sure they would be each other's first—and Dr. Berman says she's pleased that Courtney, Pierce and their mothers have had such an open dialogue. "[Parents saying], 'Don't do it' doesn't work. It's just like putting your head in the sand," Dr. Berman says. "It's important for you guys to be having these conversations with them, ideally from a much earlier age."