HELPP!! Why does Layeville have "a strange smile etched on his lips" when he realizes he will be the only man alive on earth?

Plz first person to respond get brainest read the passage. i pictured myself lazing on a stretch of white sand, a gentle blue sea rocking before me and palm trees rustling behind me. i could go for that. "just think," added josh,"no freezing rain or sub-zero temperatures." "no tornadoes . no blizzards," contributed kayla. "just lovely,sunny days." which provides the best textual support for the claim that the propose of this paragraph is to entertain?