Questions on side position

Hello. I’ve practice using aneros for years and have always struggled. Over the last year or so I’ve made some real progress but still trying to get there. I have almost ever model but consistently use the program. I’ve always done the laying on back method but recently tried laying on my side and noticed a new feeling that I would like to explore. But I have two questions. 1. How do you keep you dick from rubbing against the sheets? 2. How do you do nipple play? I have easy access on my back but seems like it’s not the same while on the side. Any advice is welcome and helpful! Thank you