D
Complete Dictionary of Dreams
The penis is a symbol of masculine power, and the dildo is a manufactured penis.
It is a substitute for this masculine power and can represent a desire to stimulate this power within in the absence of projecting it onto an outside source. In a dream, the power being expressed, while inherently sensual in nature, may not necessarily be about the sex drive. Look to where in your life you have a desire or need to increase your sense of power.