One morning Tom calls his boss and says "Good morning, boss.  Unfortunately, I feel terrible today. I got a headache and stomach ache, so I'm going to take a sick day, if that's alright."

His boss replies: "You know Tom, I really need you to come in today.  So, I'll tell you, when I feel like this I go to my wife, and I ask her for some sexy time. That always makes me feel better, and then I can go to work. You should try that." 

2 hours later Tom calls back, "Hey Boss, I followed your advise, and I feel great so I'll see you at work soon. By the way, you've got nice house."