Sex really is an effective selling tool. But it's not all about blondes bouncing out of bikinis with buckets of beer. Take this event, for example: The Dallas Architecture Forum presents architect and critic Aaron Betsky. Unless you really love construction and design, your reaction was, "Yawn. Is there a rerun of Lost on tonight?" But let's put it another way. Meet Aaron Betsky, the author of Building Sex: Men, Women, Architecture, and the Construction of Sexuality, in which he equates skyscrapers with penises and interior rooms with vaginas, and Queer Space: Architecture and Same-Sex Desire, which says sex is the driving force behind homosexuals' use of material space. He also thinks efficient, practical but still aesthetically pleasing Danish design will save the world! Now you want the deets, right? Betsky speaks at 7 p.m. in the Horchow Auditorium of the Dallas Museum of Art, 1717 N. Harwood St. Admission is $5 to $15 (free for DAF members). A fund-raising dinner with the DAF and Betsky follows at Standard Restaurant, 2816 Fairmount St., at 8:30 p.m. Tickets for the three-course dinner and wine are $115. Call 214-764-2406.