I have a confession to make.

The forgotten man and the tree are metaphorical. It is Kris' mind that tries to block the negative memory out y using a tree to obscure the view of what actually transpired. The forgotten "man" is Dess. She molested Kris in the forest. That was the first time someone forced them into anal sex. Back then, they didn't know what a "trans woman" is, they wrongly associated having a penis with being a male, hence why it's forgotten "man". The reason why it gives you an "egg" is because that's what the trans community calls trans women in denial of their true identity.