“We’ve been hooking up for 3 weeks, so I figured going over to his place and having sex would be better than being single in college for the third year in a row”, Sara Egerton, class of 2020, says distractedly. She’s flicking through tinder, swiping left on photo after photo of guys on the Sig Ep roof during spring fling. “He came in about 2 minutes after telling me he loved me. It was weird."