For some reason people seem to take Spock and Bones' conversation in the jail cell: "Do you know why you're not afraid to die, Spock? You're more afraid of living. Each day you stay alive is just one more day you might slip and let your human half peek out. That's it, isn't it? Insecurity. Why, you wouldn't know what to do with a genuine, warm, decent feeling." and try to pass this off as Spones material. As romantic.
Frankly, I don't understand how we got here as a culture, because this is the least romantic thing I've ever seen in my life, and this is from someone whose favorite ship in Star Trek is Spones. I get that this scene has two men emoting strongly while in close physical proximity but… no. Just no.
In this scene, McCoy literally weaponizes the fact that Spock is passively suicidal. I cannot emphasize this enough. McCoy guesses that Spock is so scared of living with himself that he would either prefer or at least wouldn't mind dying, but this is just a shot in the dark. When it becomes obvious that he's struck a nerve, McCoy smiles. He's happy that he's found a weakness, a way to win points in their ongoing argument.
This is probably the most cruel thing we see him do in the entire series. We never see him act concerned at all for Spock's mental health, he's just in full predator mode, honing in on the weaknesses his intuition and abilities as a psychologist allow him to find. And then, because that isn't enough apparently, he goes even further to hurt Spock more, making up stuff he knows isn't true based on stereotypes he knows Spock hates to get a rise out of him - the 'warm decent feelings', bit.
He bullies Spock so hard here, backing him into a corner figuratively, emotionally and physically that Spock actually does something he hates doing - he admits that he has emotions out loud just to get him to stop. ("Really doctor?")
After this, we don't even get a half-decent apology. We get "I know… I'm worried about Jim too." Which. A: after saying something that awful a real apology is in order, not just implied. Weaponizing mental illness, especially when your friend doesn't want to live is horrible. But B: he's not even apologizing for that part.
"I'm worried about Jim too," is an apology for implying Spock has no emotions and wouldn't know what to do with "a warm decent feeling". It's an acknowledgment that Spock does care about Jim, but it has nothing to do with McCoy violating the Hippocratic Oath to do legitimate psychological damage to Spock.
Guys, I love Spones as a ship, but this was not a romantic scene. This was psychiatric abuse. There need to be stories detailing how Spock and McCoy talk this out and McCoy apologizes for trying to weaponize Spock's suicidal ideation and actually tries to help the guy instead of using his mental illness to score points.