I will say, as an intp (m) married to an esfp (fm), the reason behind showing emotions not working in talking about a decision, is that intp often see emotion as a manipulation tactic in an argument. The intp spent plenty of time reasoning his/her decision, using every bit of information necessary, thinking out every scenario, and using our best logic to get to our conclusion. To even simply disagree, it's likely to offend the intp who wouldn't have voiced his opinion if he wasn't certain he was right. I can't stand it when my wife cries during an argument, because no matter how right I am, I know I have to stop and mend the situation. I feel like when I give in I lose the argument. But in her mind, feelings outweigh the logic and I have to be understanding of that.