TULSA, OKUniversity of Tulsa sophomore Ben Stoll was gracious enough to sleep with third-year law student Rosie Andriessen Monday. 'Rosie had been acting insecure and needy all evening, so I figured I'd help her out a bit,' said Stoll, who met Andriessen last year through common friends. 'She probably thinks she's too chubby. It must be a big boost for her to have sex with a guy like me.' Stoll decided not to call Andriessen the next day, nor to return any calls she might make, so as not to get her hopes up. 