I do get clients who send me pics/clips or ask me for pictures/clips. If it's a first timer, I just respond with "oh look, a wild dick". Regulars know it's a charged for service.

I get more annoyed with regulars who expect every text to be responded to straight away two weeks out from a booking. If they want that, they're paying the additional for each day. And I let them know that. Pretty quickly they calm it with the sexting.