I hate going to the doctor's, but my wife is always pushing me to go. Why?

She cares! Men see doctors much less than women. An annual physical is always a good idea, since many diseases are asymptomatic: bp, cholesterol issues, skin lesions, and on. Make her happy. She cares!
Because she is SMART. According to the american academy of family physicians most men in the us don't receive preventive medical care & are only seen when very ill. 92% of men surveyed waited for several days to see if they would get better before getting care. In 80% their wife or significant other was a major factor when they did seek medical attention.