The fat guy on the left is thinking "I'm having a lot of fun, even more fun than in my Santa suit."
The semi-bald guy next to him is thinking "I can't believe I'm wearing this kilt and standing next to these other clowns."
The short guy is thinking "He better not move his hand any further or I'm gonna scream."
The happy guy on the right is thinking "I wonder if the short guy is wearing anything underneath that nice kilt."
vagabond is thinking "Do I know how to title my threads or what?"