Prompt: Charles studying/writing a paper/preparing for a presentation, and Erik is there ostensibly to act as a sounding board, but really to just keep attacking Charles' neck or kiss him senseless. Or in a sweeter mode, cuddle (http://xmen-firstkink.livejournal.com/2439.html?thread=2517895#t2517895)

Fill: I built you a home in my heart (http://xmen-firstkink.livejournal.com/2439.html?thread=3029639#t3029639)