It’s odd how little architects have had to say on the subject of sex. If they’re routinely designing the buildings in which sex happens, then you might expect them to spend more time thinking about it. Buildings frame and house our sexual lives. They tell us where and when we can, and cannot, have sex, and with whom. To escape buildings for sex — to use a park, a beach, or the back seat of a car — is a transgression of one kind or another. Most of us keep sex indoors and out of sight.