To see a penis in your dream signifies sexual energy, power, aggression, and fertility, especially if the penis is erect. If the penis is flaccid, then it points to sexual frustration.
To dream that your penis falls or snaps off implies a loss of power. You feel you are losing an important part of your identity. If you dream that your penis is detachable, then it refers to your desire to temporarily escape from the demands of your waking life.
For a man to see an exceptionally large penis suggests doubts and anxieties about sexual performance, drive and libido.
For a woman to dream about a penis symbolizes overt sexuality and raw sexual desires.
Dreaming of seeing a penis of a family member indicates an awkward situation that you are trying to avoid or overlook.
If you dream that a woman has a penis, then it represents her extreme level of boldness. The dream may also mean that you relate to this woman on some intimate level that you are afraid to admit. If you are a woman and dream that you have a penis, then it means that you are feeling particularly aggressive or bold.