An Elderly Married Couple Went for a Check-Up Together

A health-conscious aged couple decided they would go for their annual medical checkup before embarking on a trip to see their kids, so they booked an appointment for the same day.
On the day of the examination, they got to the hospital, and the doctor checked them one after the other. Once he finished with the man, he took him to the side and informed him that he was in excellent health.
The doctor asked the man if he had any other medical conditions he would like to discuss before the appointment was over, and he answered:
"In fact, I do. After I have sex with my wife the first time, I am usually hot and sweaty. And then, after I have sex with my wife the second time, I am usually cold and chilly."
The doctor found his comment strange and interesting and assured the man that he would research the condition and get back to him. He then went in and examined the woman.
After her examination, he informed her that she was in great shape and asked if she had any medical conditions to discuss with him. The woman replied that she had no concerns or questions, and then the doctor told her about her husband's condition.
He asked her if she knew anything that might be causing it.
The woman scoffed and rolled her eyes before answering the doctor, saying:
"Oh, that old buzzard! That's because the first time is usually in July, and the second time is usually in December."