I have a recurring one. My GF and I are watching some movie with one of her girl friends. Having a few drinks. Nothing sexual about it. We do this in real life often. But in the dream the girls start discussing cocks. The dream never makes it clear as to how it comes up. They wind up their discussion of cock with the friend asking my GF if it would OK to look at my cock. My GF takes control and says "sure" as I sit there stunned she comes over to me and pulls down my pants and my cock starts getting hard. As if I were a science class experiment my GF is explaining all the wonderful things about my penis. She tells her friend "don't be shy, you can touch it". As things move along her friend winds up sucking me off. My GF suggests that we all get naked. My hard on is raging. As this is going on I do not say one word. The wrap up is my GF says "you can fuck him, I don't mind and I know it's been a long while since you last got fucked." The friend sits on me and after a few minutes I have her on her back and plow her hard. My GF has the biggest smile as her friend starts a steady stream of "dirty talk" as she encourages me to fuck her good. Then the dream ends before I cum.