 Some of the advertising was not overtly gay; however, much of the advertising was for establishments or products that were well-known to gay men, or contained symbols often used to identify gay-oriented material, such as the Greek letter "lambda".There was also an abundance of advertising for men's boutiques and clothing companies, especially those—such as International Male, for example—that offered skimpy men's underwear or swimwear.Advertising for other products or services for gay men was explicit; for example, the ads for Hand in Hand Video, a gay pornography studio; "The David Kopay Story", regarding former professional football player David Kopay's homosexuality; and an ad for books by noted gay author Paul Monette, "The Gold Diggers" (containing the tag line, "Glittering, Glamorous, Gay"), and "Lovers