I am cumming

Does this happen to anybody else? As soon as someone says they are cumming it instantly makes you cum. Last night I was having sex with this women I had her bent over doing her doggy for a good bit didn't feel as if I was goin to cum yet but I could tell she was getting near then as soon as the words left her mouth and her pussy clenched hard round my cock I exploded in her pussy. Happen to me all the time lol. Let me know plz?