Write a dialogue-driven conversation between a researching alien and his superior who are studying humans on the beach. It should explain (or express confusion over) the following phenomena:
-Sandcastle building
-Swimming in the ocean
-Sunbathing
Thanks!
Ken pressed the door open to enter Commander Jax's quarters.
"Progress report," Jax said abruptly.
"We've been studying the humans for the past few months and uncovered some strange phenomena we have yet to understand."
"Such as?" Jax turned around in his chair, tenting his fingers.
"The humans seem to enjoy spending time on the stretch of eroded granular siliceous rocks bordering the water and sometimes in the water." Ken adjusted his glasses. "They call it a beach, sir."
"Hm, what activities do they do on this 'beach'?"
"They spend time in the water, sometimes floating on inflatable rafts or using tubes."
"Doing what?" Jax raised an eyebrow.
"Nothing, sir. They just sit there."
"How peculiar," Jax mumbled, glancing downwards at his desk. "Anything else?"
"The humans also like to lie down under the sun, turning occasionally to lie on their front."
"Do they not know that the sun's rays are deadly with prolonged exposure?"
"They seem to, sir. They do apply an oily cream or spray-based substance that seems to protect them, if only briefly." Jax frowned.
"If they understand the consequences of remaining in the sun's path, why not avoid it entirely rather than applying something unpleasant to their bodies and lying in a place where they can be affected by it?"
"Unclear, sir."
"I'll get this data to our analysts right away. Anything else to report?"
"Yes, the humans also seem to enjoy building little facsimiles of early-human structures, castles namely, out of sand," Ken reported.
"What purpose do these structures serve? Housing? Defense?"
"Neither, sir. They aren't big enough for that purpose, and, inevitably, the ocean waves destroy the structure. Our team has even observed humans kicking down their own structures shortly after construction." Jax furrowed his brow, perplexed.
"Well, good work, Ken. Keep studying and report your findings, odd as they may be."