Slenderization, by Amy Friedman

Alexy was sunk into a corner armchair at Dark Streets Books, nose deep in a paperback. As he’d never read much, I was intrigued. 
“Whatchoo got there?” I asked. 
“BBD,” he muttered. 
“Bram’s Bloodly Deadiquette?” I smarted. 
“Very funny,” he scowled. “Bagged Blood Diet.” He looked embarrassed. 
“Like blood banks?” I said. 
“Exactamente,” Alexy said. “Healthier blood. Banks don’t take from druggies or diabetics. No more Fat Alexy.” 
“So, you gonna open an account?” I said. 
“Wish I could! I’m so tired of the hunting, the mesmerizing … I’d rather just slap a bag on my fangs and be done.”