If you'd' like to get into more detail (which means a better interpretation), feel free to private message me, and I won't make it public. Otherwise...

Characters in our dreams are often reflections of ourselves. If there is someone in your dream you know/knew, you're probably subconsciously seeing a trait shared between the two of you. Sexual connections in dreams (ie - hooking up), is never about actual sex, save for nocturnal emissions. Typically it's your subconscious trying to relate to this perception of part of your psyche.