How do you sext a guy?

By sext, I think you mean sexy texts? I have to admit that when I was 13 I had a fit girlfriend and we sexted every single night! so I am an expert! You just have to say, to start, that you love her... Etc! Then say how you want her with you so you can be together and snog and stuff, tell her that , if you saw her that day, that she looked really pretty today and that you wished that you could have made a move etc! After a while of that, you can begin to get really dirty!! Like... I am topless and want you here with your fit body!! That worked sometimes! But just be cheeky but not imature and just be smooth and not pushy!! Good luck mate!