Nevermind, this riddle is too easy.
They're starting to get quite dark
Cloning.
Sir. Groan worthy penguin jokes(https://allwrong.wordpress.com/2007/10/05/penguin-riddles/)
The riddle of life!
Because it ends with A-men
Only one but he has to have a nurse to tell him which end to screw in.
Hubs: With the door locked. Me: She means how do we manage...but yeah.
Me: Shower. W: ...what else M: Make a new iTunes playlist. W: Wow. M: Might not have time for a shower.