I want a kitchen knife. I think you're a little young for that.

Hey, Barney! You shouldn't use this line for private use!

Lt. Colonel Hughes, please keep personal calls to a minimum!

It's the apartment I'm renting for my personal use.

Hey, I almost forgot.<br>I just remembered something I have to do! Gotta run, darling!

but you can't write it off if it's for personal use.