This is an expression used to describe an activity or action that enhances one's awareness of different cultural practices. This can be trying different foods, bungee jumping, traveling etc.
"Let's go watch the sunrise tomorrow."
"Why the fuck would we do that?!"
Come on, you obviously need a little cultural enrichment!
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.