A young man went to his rabbi complaining that he found out something about his new bride that had he known before he wouldn't have even gone out with her. He said they didn't hide anything from him, he just forgot to find out this piece of information about her. He is happy with everything else. Just this one thing bothers him.
The rabbi told him, it says by Adam HaRishon when he had a piece of his insides removed to create his wife Chava, ויפל ה' אלוקים תרדמה על האדם - Hashem put Adam in a deep sleep before he did it.
The rabbi asked, why Hashem had to totally put Adam to sleep? Why couldn't he give him local anesthesia and do the operation while he was awake? The rabbi said, "It was to teach us a lesson. It happens very often in shidduchim that people "fall asleep" regarding certain matters. Things that meant so much to them, somehow they forgot to inquire about. The reason was because Hashem put their minds to sleep in that area, because He wanted the shidduch to take place. He knows better than anyone who is meant for who and He is the one making all the marriages."
The rabbi concluded, "You married the perfect person for you. How do I know? Because Hashem let it go through and He is the One who makes marriages." The young man felt much better and with his new attitude was able to have a great marriage.
A woman said there was one thing she would never accept when it came to shidduchim: Somebody who smokes. Yet, when it came time for her to get married the person she married was someone who smoked a lot. She later said, "I couldn't believe that I forgot to ask that question before I went out with him." For every other boy that she ever dated, that was her first question. But when it came to this person, her zivug, she totally forgot to ask. And baruch Hashem, today they have the happiest marriage, and by now the man quit smoking. This was ויפל ה' אלוקים תרדמה על האדם because he wanted the shidduch to happen.
A man said his wife told him, there was one thing she would never settle on when it came to marriage. She had to have someone with a college degree. This man did not attend college even for one day, and he became her husband, and they couldn't be happier today.
The woman admitted later how strange it was that when it came to him, she totally forgot to ask about his education. מה' אישה לאיש - Hashem is in charge of marriages. We should never feel that we forgot to ask certain questions and now we're stuck with who we got. And even if it was a very important matter, the reason we forgot is because ויפל ה' אלוקים תרדמה - Hashem put us in a deep sleep because he wanted the shidduch to take place. Everyone gets the shidduch that they're meant to get.