Lol...sorry you misunderstood me. I didn't say you were wrong. Ok look at this...

Now uncle, if the release of one egg is considered to be normal, don't you think fraternal twin conception is abnormal?"

My point is; the concept of variation should be emphasised on else someone may think he/she's abnormal and you know the consequence of this (especially to children).

You were never wrong in any way. After all you said it.... its kinda philosophical.