Terms of Endearment.
Spencer Reid x Reader
In which Spencer decides to call his girlfriend cute names, because he read somewhere that terms of endearment can make a partner feel more special and loved. He wants her to feel loved, so he experiments over the course of a few days: he calls her every pet name he can think of until he runs out of new ones to see what she likes the most. When she catches onto what he’s doing and asks about it, his response is adorable.
(not my gif but i need it in my life)