An overweight man visits his doctor to complain about his lack of a sex life.
The doctor swiftly concludes that it’s the man’s extra poundage that is interfering with his ability to perform, so he tells the man to walk five miles every day.
Two months later, the man calls in and asks to speak to the doctor.
“So, how are things going?” asks the physician. “Has your sex life improved?”
“How the heck should I know?” says the man. “I’m 300 miles from home!”