When do you use apostrophe S and S apostrophe?

Today’s question: When do you use apostrophe S and S apostrophe?

Jennifer asks:  I was taught, growing up, that you only use apostrophe-S when it is a contraction as in “John’s going home” as in “John is going home” and S-apostrophe for possession.

Was I taught incorrectly?????

How do you distinguish between possession and contraction in the following sentence: ” The man’s nuts.”

Does it mean “The man is nuts.” ?

Or is it reference to his testicles? How can you tell?????

Help!


 

I Love Apostrophes

Original song, inspired by Robofillet That there next to me (on the left-your left) is Jane Ives. You can look at my username for my name. It’s there. (: Lyrics: What’s that little doodle it’s making me rejoice I stumble ‘pon it whilst I read I know it’s the right choice The grammar choice it’s a plus plus, 102 percent Two words in one are demonstrated when apostrophes are present Apostrophes apostrophes are awesome Hats off to thee Apostrophes are awesome I applaud the use of your contractions But I hope you watch your actions Make that squiggle where it’s gotta be I love apostrophes There made to use it’s a grammar binge So use them up and I won’t cringe A supplement for missing letters If you think that’s great, well it gets better Possession can be signified That floating comma by whom I abide I know it’s his or hers or mine With that happy little sign Apostrophes apostrophes are awesome Hats off to thee Apostrophes are awesome I applaud the use of your contractions But I hope you watch your actions Make that squiggle where it’s gotta be I love apostrophes You’re (two words bound by an apostrophe) learning your (possession) apostrophes Homophones, their (ownership) best friend, they’re ( they and are’s offspring) Hand in hand with a little thing