Why So Many Gay Men In San Francisco?

Too much. From Bookworm:

Roseann Galvan's 2-year-old son, Brendan, who has been happy at Habitot summer camp in Berkeley, brought her a book to read to him that had a huge white warning sticker affixed to the front cover: 'A parent has asked us to warn you that there are pictures of military aircraft on the last pages of this book.' (source)

Besides idiotically ignoring the need for defense, depriving boys of the fun of big machines feminizes them. I'm sure this school would put a warning on a book with a picture of a bulldozer in it, or a church-going couple.