Too Young To Be Grumpy

I am getting one of the foremost accidental creator of proverb-cocktails. I reckon I've inherited it from my mother as she also does it, and, now that I've married someone who's mother is also a proverb-mixer, it's just getting worse.

Last night we managed to finish off a cheesecake that I'd made last week. It was getting old, so my wife gave us rather large portions to finish it off - which incidentally, I couldn't finish. In bed later that night I generated the first of the set of proverb cocktails below, that I've been witness to.

• Glad to get rid of the back of that cheesecake.
  Because the front of it is still fine.
  
• Oh yeah, that brings back bells.
  Alas, the bells had run off with my memory.
  
• I'm getting rather old in the tooth.
  I guess I grind my teeth too much for them to be long.
  
• You've got your hands cut out with that one - Mother-in-law
  Too much Paper-Scissors-Stone makes one think one has paper hands.
  
• Those two are tied at the thigh - Mother-in-law
  The join at the hip has slipped down.
  
• Although I've never been there, I didn't recognise the place. - Mother
  Doesn't go by the name of Claire or Mrs. Voyant.