@dlowan,
When I was 14 I hated euphemisms.
My mother had just died, and when people asked if she was any better, I was horrible enough to say bluntly "She's dead." I was kind of angry, I guess.
Anyway, people couldn't cope. I was mean.
But put to sleep REALLY got me then.
I had a phone conversation with our vet's receptionist that went something like this:
"Hi. Our old cat's kidneys are no longer responding to the medication. I need to make a time to come in and have him killed.
"Awwww...you need to have pussy put to sleep?"
"Actually, I need him euthanased."
"Yes...we want our pussy cat put to sleep."
"No...the whole object is that our pussy cat never wakes up."
What a pain teenagers are. Or, I was, anyway.