Patient comes in with chest pain in the middle of the night.
Doc: “So did it wake you up from sleep?”
Pt: “No” (wife blushing)
Doc: “OK, so you were awake?”
Pt: “Yes”
Doc: “So how long did it go on for?”
Pt: “Well, we stopped as soon as I got the chest pain, but normally I can go a lot longer…”