Why does wet dream necessitate ghusl (ritual bathing), while remembering sexual intercourse while awake does not?

A wet dream necessitates ghusl (ritual bath) due to the emission of maniyy (seminal fluid), which affects the body and soul. Performing ghusl after it strengthens the body, heart, and soul, removes sluggishness and lethargy, and restores vigor to the body. As for thinking about intercourse while awake, it does not necessitate ghusl unless maniyy is emitted. The Shari'a (Islamic law) is based on profound wisdom, and not all aspects of this wisdom may be apparent to us. Ghusl from janaba (state of ritual impurity requiring ghusl) is among the acts of worship that have a devotional aspect outweighing the aspect of rational explanation.