For a long time. Damon never had a good childhood. He had to live, with his horrible step father while his mother did nothong.
He had a bad childhood and wants to have a better one. With the genie's help. He can have a second chance for a better childhood.
He also thinks Monica would be a perfect mother for him as well. If she can't be his girlfriend. She can be his new mother.
Damon makea his wish. "Genie I had the worst childhood in my whole life and I want a second chance at it. So for my first wish. I wish to be a 5 year old kid again and I want my new mom to be Monica. She'll be a good mother who will protect me from any danger." Said Damon.
"An interesting wish master. Very well I shall grant it for you." Genie then grants Damon's wish as she goes back into her lamp.
Damon begins to feel himsels regress, in age, as he shrinks as his apartment changes to suit his new form.
His adult teeth fell out as baby teeth grows in as his clothes change as he wears a spiderman shirt, blue shorts and velcro shoes.
When it was over. Damon was a five year old child and he was now in a kids room full of toys.
He could hear his new mothers voice. It was Monica. "Damon sweetie. Breakfast." Said his new mom.
"Coming mommy." Said Damon in his childish voice. He also found the lamp that turn into a toy.
Damon place the lamp, in the toybox and heads downstairs to start his new child life.