Many years ago on a long trans-continental flight, an elderly lady asked if she could visit the cockpit. When she got up there, she found four crew. She asked the first what he did, and he explained that he was the Navigator and his responsibilities were to keep the aircraft on its track across the earth.
She turned to next one and asked what he did. He explained that he was the Flight Engineer and his job was to monitor and troubleshoot any aircraft or engine system problems to keep the aircraft operating smoothly. She turned to the next one and asked what he did. He explained that as the Captain he was responsible for everything in the aircraft and to fly and direct everyone in it.
She turned to the First Officer and asked, “Well young man, what is your job?”
He replied “Ma’am, I am the captain’s sexual advisor.”
Somewhat shocked, she said, “I beg your pardon young man, but what do you mean by that?”
“Very simple ma’am. The captain has told me on a number of occasions that when he wants my fucking advice, he’ll ask me.”