A female pigeon cannot lay an egg unless she sees what?

Question
What keeps growing until you are 35 then starts to shrink?
Answer
Your Skeleton

Question
What does the energiser bunny wear on his feet?
Answer
Flip flops

Question
If an alloy is an amalgam what metal must it contain
Answer
Mercury

Question
What are the Sirocco, Mistral and Chinook?
Answer
Winds