you don't know for sure and it only takes 1 person to get an STD. They could easily keep it hidden.

That is what people aren't getting that are calling me insecure, judgemental, self-righteous ...etc. I am saying if someone had sex with 200 people within a few years, and a test required at least 30 days after exposure to start showing testable results, their test results will never be accurate if they're having sex with new people on average every 6-7 days. It is mathematically and physically impossible to have sex more often than what a test requires and have it be accurate. If someone wants to be more adventurous than I am willing to be, go ahead. Go ahead and have sex with someone that will have sex with anyone (the hundreds category). It makes people feel bad to hear me say I wont have sex with someone that has had sex with 200 people.