How can my boyfriend say he can't "justify" the cost of treating his dog's health complaint?

What is Kool Aid and what does it mean when someone tells me in a pejorative way to keep drinking it? It is usually said when the other person has run out of arguments in a discussion and they are always American. Is it a drug?
Why is it said that after awakening, there’s no need to explain spirituality to someone in grief, but rather to just offer compassion?
When dealing with a woman who is incapable of being honest, should you refrain from investing emotional currency?
What are the key differences between conditional love in relationships and the unconditional love found in spiritual enlightenment?