I've always had facial hair and the trend that people hopped on start many, many years ago, when bears were fully embraced. Everyone realized there's no shame in embracing your natural body hair. I've had people throughout the years actually harass me and tell me to shave all my body hair and maybe I'd get booked. At the end of the day I love it and many men do as well. I think asking them to trim isn't that big a deal before a session, as hair does grow back. If that's what you want, as always be transparent and put it in your profile. That being said from the outside looking in, it's apples to oranges they're plenty of clean cut guys, and they're plenty of guys with who are hairy with beards. That way you don't have to ask someone to change.