Why do people take things that are clearly jokes so seriously?

I made a question with my friend regarding gay people around an hour ago that was so ridiculous and only one person seemed to understand that it was a joke. Is this what's left of the world?
Update: You can't be both. You have to prefer one. Otherwise you're just being greedy. Also, bisexual people can't see clouds

That was the joke. Does that sound serious to you?
Update 2: Why do people think bisexuality exists.

You can't be both. You have to prefer one. Otherwise you're just being greedy. Also, bisexual people can't see clouds.

Does that sound serious to you?
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