Tips for Surviving a Fling with a Sexy Younger Man ... If you accidentally bang your best friend's younger brother, here are a few important tips... One: Do NOT brag to your friend about how well-endowed her brother is. Two: Do not go back for seconds. Or thirds. Three: Do not let him see your muffin-top or jiggly behind. And definitely don't let him feed you cookies in bed. Cookies are bad. Remember that. Four: Act like a damn grown up and apologize for riding him like a bull at the rodeo. And DO NOT flirt with him when he laughs at said apology. Five: This one is crucial, so pay attention. Do NOT under any circumstance fall in love with him.