Story here , out of *The Star * in Kuala Lumpur.
“Out of 5,529 heart attack deaths in Asia , 34 happened during sex. Of that number, 27 were having illicit sex.”
So get that checkup if you’re planning to fool around. 
But what if my 20 minutes of physical exercise a day is illicit sex?
I’d want to see some control studies done. Perhaps, of the group most likely to have a heart attack (middle-aged and older men), 80% of their sex is illicit? In that case, just having sex is dangerous. As for me, I like living dangerously 