What does it mean if a guy asks you to send him a selfie, even though he already knows what you look like?

There's this guy I have on snapchat and even on iMessage and he's always telling me to send him selfies even though he already knows what I look like and sometimes he asks to screenshot them to keep them. Do you think he's showing his friends what I look like? (No he's not asking for nudes, only selfies of my face)
What does it mean if a guy asks you to send him a selfie, even though he already knows what you look like?
Post Opinion