I (28M) am seeing my Fraternity Little Bro (26M) this weekend to hang out. I asked him what he wanted to do, and after throwing out some suggestions he said he wanted to go to the Korean Spa with me. He told he has been to one before but this time it would the first time going with someone he knows and he feels comfortable going with me because he knows I've been a nudist for 10 years and I'm gonna be supportive. He told me he is nervous, and that his next step after the Korean Spa would be going to a nude beach. What can I do to help him with his first social nude experience, help encourage him to make the next step, and make sure he's feeling safe and secure at the spa?

Update: My Frat Little Bro's Frat Little Bro (22M) will most likely be joining us and he is not a nudist at all. So we shall see how he reacts after he looks at the website we gave him for the korean spa.