Ordinarily Tim Adkinson, a trucker, sleeps in the back of his vehicle. But on a warm night at the end of March, he checked into a hotel in Austin, Texas. He had dressed up smartly: white linen shirt and chinos, hair brushed forward in an attempt to mask his receding hairline. On his wrist he wore a yellow paper wristband. This accessory was meant to signal to the people he’d meet that evening that he was single, open to dating and, most importantly, looking to procreate-a lot. “I’m 32 years old and I haven’t had any kids,” Adkinson told me.