You’re no doubt already familiar with the concept of a “booty call”. (In case you’re not: it’s telephoning someone urgently, usually late at night, in order to have sex with them.) Booty grazing is essentially the same thing given a more industrial approach. It is the act of mass texting a generic message to members of the opposite sex in hopes that a guaranteed hookup for the night will be established. Getting multiple volunteers is a risk you will have to take.