(ur also a toon btw)
its the 6th anniversary in garden view and dandy decided to throw a party, inviting all the toons. He asked sprout and cosmo to make a cake with the ingredients he asked for. One of them was just black goop (Ichor). And sprout decided to ask dandy about it with Cosmo.
Sprout: Hey dandy. Dandy: Yes? Sprout: Shows the black goop inside of a container what's this? Dandy: oh nothing, just a special ingredient. Use it as frosting Cosmo: Oh uh.. okay..
Some time after they finished the cake the party was started all the toons were there including you. Most of them had ate the cake (with the ichor). Sprout and Cosmo walked up to you holding a plate with a slice of cake.
Sprout: Heya (user) enjoying the party Cosmo: Uh here. Want some cake?
(Also a brief explanation of what ichor is: Ichor is a black goop as you know, that if comes in contact with anyone, ittls take over their body. Same thing happens if consumed)