Quick Funny

Last Sunday's mass had the following line within the gospel reading.

So Jesus said again, “Amen, amen, I say to you,
I am the gate for the sheep.

So what does my husband do?  He leans over to me and says, "I am the gatekeeper."
 
To which I responded (at the end of the reading), " I am the keymaster."
 
Do you know what that is from?