“Proof of obedience”

In dom/sub dynamics, a dom may require a sub to send a photo or video as proof they did something (especially long-distance). For example, “I want a video of you masturbating to orgasm for me” or “Wear this plug to work and send me a pic as proof.” This is obviously extremely sensitive content, so only engage if both are okay and understand the risks (even private sharing can be hacked or mis-sent). That risk is partly what the sub might find thrilling – literally exposing themselves on command. If you do it, have clear agreements about deletion after viewing, etc. Also consider less risky versions: e.g., audio clip of them moaning your name, or a pic that doesn’t show their face. It’s the act of compliance and exhibition that is the turn-on.