Quote from Martin in The Show Where Lilith Comes Back
Frasier: So, Lilith, how is Frederick? Lilith: Well, as you know, I've enrolled him in that chess camp in the Berkshires. It's really quite stimulating. For eight hours a day, he sits in a large auditorium, with 300 other children, mastering the Alhausen-GrobOpening. Martin: Well, he's in the mountains. Shouldn't he be out there in the fresh air? Lilith: Every day after lunch they go for a nature walk. Unfortunately, Frederick is allergic to seven different varieties of ivy, so he has to wear long sleeves, and long pants, and a bonnet with a net on it. Frasier: Boy, I sure hope the other campers don't make fun of him. Martin: Oh, I'm sure they don't. You know how kind kids can be. Hell, all he needs is a birthmark on his forehead, and they'd beat him to death with a shovel.