You take flowers down a slide to a drunkard that you picked from your luxuriant garden. You picked the flowers from the luxuriant garden, not the drunkard, mind you. Also the drunkard has a cane, but not flowers. That’s why you picked some from your luxuriant garden and slid down your cool slide. Now the drunkard has a cane and some flowers.
The drunkard is so happy to receive flowers from your luxuriant garden that he begins to moan (も) with pleasure. The moans are getting louder and more erotic. You’re kind of creeped out. You really want him to stop moaning.