Glickman's first point? Remember that you’re not filming a porno. Don’t try to emulate anything you’ve seen on Pornhub! You’re just asking to get hurt, and nothing is more discouraging than a supposedly pleasurable sex act that turns painful (assuming you’re going for pleasure, that is).
Plus, porn stars are people who are likely having anal sex multiple times a week. And they are prepping for it-they’re just doing so off screen. Rimming is a great place to start with a partner because, unlike other forms of assplay, it doesn't require much advanced preparation.
Wash your ass before you ask someone to venture back there, and then relax and enjoy what’s basically an all-encompassing blow job.
