Why do guys lie to share the same common with a girl?

This is probably unnecessary but let me give you an example. I asked him what his favorite color was and he said red (he knew my favorite color is red because of things that I had a lot with the color red) πŸ˜† I notice that he has a lot of brown, even with the emoji he uses is the color brown heart but he told me he likes all color but red is his favorite. Yet, he often uses the color brown lol.
Why do guys lie to share the same common with a girl?
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