Set 9x02.
Harvey hears her while he's leaving her office and sends her a message:
H: "I heard you. I'm going to save Metropolis anyway."
D: "Thank God you have your business card… Otherwise, if someone asks for your phone, you would never get a new client..."
H: "Yes, yes. Very funny."
D: "My jokes won't change because we're together now. You're on notice."
H: "My jokes neither."
D: "Good to know."
H: "Can I remind you again to use protection?"
D: "You're an idiot!"
H: "Do you know about methods of contraception?"
D: "Yes… You?"
H: "I think."
D: "Good, so you know what a condom is… Could you go to buy more? We use the last one, and I want sex tonight."
H: "I definitely can. Mine place or yours?"
D: "Yours, your bed is so much more comfortable. After sex, I need to sleep."
Within minutes, Donna receives a photo of a package of condoms.
D: "Never in your life did you sign a document I asked for so quickly!"
H: "Documents aren't as hot as you are."
D: "See you at night, Superman. Metropolis need you now"
