pediatrician question?

Ever since I was around 14 whenever I went to my pediatrician, they ask me questions like if I've done drugs, drank alcohol, had sex, etc etc. 
What happens if I answer yes to having sex? 
I've been answering no because I'm still a virgin, but I'm in a relationship for the past two and a half years and that's probably going to change soon. 
(For the record, I'll be 20 in September)

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