So I was at the beach with my family, and we saw a man selling seashells. He had all sorts of shells in different shapes and sizes, and my kids were fascinated by them. The vendor told us that he had been collecting them for years and had become quite the expert

I guess you could say he was a shell of a man with a lot of knowledge

I told my wife she was drawing her eyebrows too high

She looked surprised

So I was at the beach with my kids, and we saw a big sandcastle that someone had built. The kids were impressed by how tall it was, and we started talking about who could have made it. I joked that it must have been a professional builder, and then I saw the sign next to it that said

it was a 'castle' in the sand, built by a 'grain' architect

Why did the bicycle fall over?

Because it was two-tired.