What does it mean dreaming about someone sucking your penis?

The dream has no particular meaning at all, unless something else occurred in the dream, or unless the penis belonged to some specific person or threatened you in some way. Your emotions during the dream are also important in determining the meaning of any dream. Simply dreaming of any genitalia, male or female, could be nothing more that natural curiOSity, or a fragment of a normal sex dream, neither of which are cause for concern.