One day he came across his naked wife on the bed.

Early from work one afternoon, a guy finds his wife stretched out on the bed puffing and panting when he gets home.
The guy probes, “What are you doing?”

Err, she stammers back. “I… um… I believe I am having a heart attack!” The credulous spouse shouts, “Oh, quick, I’ll call an ambulance!” When his kid Johnny shows up crying his little heart out, dad hurries downstairs picks up the phone and starts calling 911. The father probes, “What’s the matter, son?”