Since he isn't the project, just focus on that. I would not give him any reason at all to make a fuss about himself, since this is your first time, it is distracting, and repulsive, just try and focus on the project. Think of it as a disability and maybe you can find peace in your mind about that. Many of these folks are in a gradient of vulnerable narcissists, so just focus on the project. Are you Christian? Take your concerns to the Lord and ignore it. It is a disability, and when a lot of people find themselves working with a disabled person, they are uncomfortable. Do you have a rapport with the instructor? Perhaps you could be honest about being uncomfortable, but be careful with that too, it could be easily misconstrued in the political climate. I see local Mennonites in the general public, shopping at Price Chopper, at the gas stations, farmers markets (of course, duh.), and they are polite, down to business at hand, though I am sure in their world, they see a lot of people they cannot wrap their heads around. If they become inappropriate, sexual harrasment is a thing. Pray for him, he needs it.