[In reference to vaginas] Someone saying you're "too loose"? Maybe that person's previous experience has been with women who weren't aroused (which, in the case of young adults, ins't that unusual)...Since many people think that penetration is supposed to be painful at first, a lot of them don't know how to wait for full arousal or make penetration comfortable. So, if a partner is saying you're "too loose," either they're simply experiencing a relaxed, aroused partner for the first time, or they're blowing smoke - either because they think it's the thing to say, or they were expecting to feel trapped in a vise, which is not how penetration should feel for either partner.