Mark plays this part all the way through the song:
E|------------------------------|B|------------------------------|G|-------------------------5----|D|-5-5-5-5-4-4-4-4-2-2-2-2-5----|A|-5-5-5-5-4-4-4-4-2-2-2-2-3----|E|-3-3-3-3-2-2-2-2-0-0-0-0------|
[I'm gay.
So what?
Don't judge.
My butt.]
In the second verse Tom joins with this:
(I just noticed that Tom plays it on the D string but i'm too lazy to change it.)
E|------------------------------|B|------------------------------|G|-0-0-0-0-0-0-0-0-0/2-2-0------|D|------------------------------|A|------------------------------|E|------------------------------|
E|------------------------------|B|------------------------------|G|-0-0-0-0-0/2-2-2-2/4-4-0------|D|------------------------------|A|------------------------------|E|------------------------------|
[I'm gay.
So what?
Don't judge.
My butt.]