Remember the news story about the straight guy softball fanatics who almost won the Gay World Series by pretending to be homosexuals? I couldn't quite come up with the punchline that all my experience told me was out there somewhere. Fortunately, commenter NOTA has supplied it:

"You know, I bet the lesbian softball league never has this problem...."

Here's my 1994 National Review article on Why Lesbians Aren't Gay, which starts with softball.