A swimmer is someone who got rejected from the basketball team during the winter sports season. "Mostly." Swimmers are the best "good-looking" athletes out of all sports.
Michael Phelps and Ian Thorpe
Mostly wandering about 90% naked most of their lives, swimmers, in fact, are usually homosexual... especially ones by the name of Eddie. Some of them might have potential for great bedroom antics, but lack the skills to woo a woman... therefore resorting to masterbation or same-sex relationships with their colleagues.
The swimmer spent most of his day in the water with his team mates, therefore his oppurtunity-cost of working on women skills was spent practicing for the big meet.