Most women will never admit they had this happen, because you do feel stupid and foolish. But I can tell you from experience and from multiple men and women confiding in me, there are a surprising number of men out there who will attempt to get a woman pregnant to hold onto her. They also like the idea of getting a woman pregnant, and will do the, "Oh just let me put it in for a second, it feels so good blah blah blah," thing. And then kaboom.