BeautifulDC replied about 2 years ago:
I'm 35, and if it's a guy I'm dating and see as a potential boyfriend and not just a fling or something, I wait until we are both not seeing other people and have both been tested for STIs. It helps to make sure I stay healthy - both physically and emotionally. My current boyfriend and I actually waited about 3 months, and more than a month after we decided to be exclusive. It took awhile to get tested and get our results.