That is a tough one to explain.
And you would think with the annual Tampon Budget reduced by 75% that he would have noticed.
Turned out to be a cute kid. I feel sorry for him, as he doesn't get to pick his Mom.
Contrast that with my situation. We'd just found out that my lovely wife was pregnant with WBill Jr, and we were keeping it quiet until we were sure everything was OK. Went to visit my grandfather. He took one look at my wife, got a huge grin on his face, and said "So, you have anything that you want to tell me?". I suppose that he didn't live to be 87 by being foolish. :-)
Some people are pretty clued in. Some are just clueless.