You give the lamp to Doug, your drug dealer, in exchange for some of the good stuff. He accepts the deal, and decides to break in the map using it as a bong.
He fills the lamp up with weed and starts to smoke. You smoke from the lamp too and get unusually high from it.
As you're smoking smoking, Doug spills a bag of chips on the lamp and quickly wipes away the crumbs. As he wipes it off a strange smoke comes out of the lamp, a booming voice echoes, "Whoa, everything's spinning, I'm like a genie and I grant three wishes to thee", the genie seems to trail off as if lost in thought staring into space.
You're kind of out of it at this point, so you don't really know what's going on, but you're fine with this turn of events. You offer the genie some Doritos and he sits next to you on the couch and starts to tell you about things people wish for and how it's all whack.
Doug turns to the genie and says "It'd be cool to have a giraffe though, I wish I had a giraffe." and with a snap of the genie's fingers there was now a giraffe in your living room. You start to worry about what else Doug might wish for as you reach for the bowl of Doritos.