“So let me get this straight,” I said to one of the mothers in my son’s preschool. “You want to have a parent meeting, where we’ll demand that all the kids in the preschool will only receive vegan organic food cooked in the school perimeter?”

She nodded in affirmation.

“Well, this sounds like a meeting I just can’t miss.” I decided. “Give me a second to check my cellphone number. I just don’t remember it anymore.”

Her mouth twisted as I took out my smartphone and opened my contact book. “You really must rid yourself of this device.” She sniffed. “It’s ruining everyone’s memories.”

“Oh, certainly.” I smiled back at her. “First, just get a divorce from your husband. Then I’ll divorce my smartphone.”

“Excuse me?” Her eyes widened.

“It’s pretty simple.” I explained. “The smartphone is a piece of technology. It’s a tool that serves us and aids our memory. You could easily say that marriage is a similar technology – a social tool that evolved to augment and enhance our cognitive functions. This is what psychologist Daniel Wagner and his colleagues discovered in the 80s, when they noticed that married couples tend to share the burden of memories between each other. The husband, for example, remembered when they should take the cat to the vet, while the wife remembered her mother in law’s date of birth. You remember the date of your mother in law’s birthday, don’t you?”

“No, and I have no intention to.” She chillingly said. “Now, I would ask you to – “

“Maybe you should have better communication with your husband.” I tried to offer advice. “Wagner found out that memory sharing between couples happens naturally when the live and communicate with each other. Instead of opening an encyclopedia to find the answers to certain questions, the husband can just ask his wife. Wagner called this phenomenon transactive memory, since both husband and wife share memories because they are so accessible to each other. Together, they are smarter than each of them. And who knows? This may be one reason for the durability of the marriage institution in human culture – it has served us throughout history and enabled couples to make better and more efficient choices. For example, you and your husband probably discussed with each other about the best ways to take a mortgage on your house, didn’t you?”

“We didn’t need any mortgage.” She let me know in no uncertain terms. “And I must say that I’m shocked by your – “

“ – by my knowledge?” I completed the sentence for her. “I am too. All this information, and much more, appears in Clive Thompson’s book, Smarter than You Think: How Technology Is Changing Our Minds for the Better, which I’m currently reading. Highly recommended, by the way. Do you want me to loan it to you when I finish?”

“I would not.” She shot back. “What I want is for you to – “

“ – to give you more advice. I would love to!” I smiled. “Well, for starters, if you want an even better memory then you should probably add a few more partners to marry. Research has shown that transactive memory works extremely well in large groups. For example, when people learned complicated tasks like putting together a radio, and were later tested to see what they’ve learned, the results were clear: if you learned in a group and were tested as part of a group, then you had better success than those who learned alone. Students can also use transactive memory: they divide memory tasks between the members of the learning group, and as a result they can analyze the subject in a deeper and more meaningful manner. So maybe you should find a few more husbands. Or wives. Whatever you like. We don’t judge others, here in America.”

“Or maybe – “ And here I paused for a second, as her face rapidly changed colors. “Maybe I can keep my smartphone with me. Which would you prefer?”

She opened her mouth, thought better of it, turned around and got out of the door.

“You forgot to take my number!” I called after her. When she failed to reply, I crouched down to my kid.

“I’ve got a lot to tell her about organic food, too.” I told him. “Please ask her son for their phone number, and tell it to me tomorrow, OK?”

He promised to do so, and I stroked his hair affectionately. Transactive memory really is a wonderful thing to have.