The last thing of course I could ever do is reciprocate if I'm not feeling it. it's not just that I don't want to say something that isn't true, it's also that I don't even know HOW to say something that isn't emotionally true, it comes out as a clumsy lie.
This is central to much of what I'm going to say and I totally agree!
Being an ENTP whose Ti is equal to or higher than his Ne I figure I'll comment and hope to give some insight. I base much of what I say on three very simple things, karma, intentions and is this really how I feel.
Provided the intentions behind my words aren't malicious or intended to be hurtful often times I will go ahead and say them. I will also seemingly not do something nice for somebody if I think there's a Karma issue at play. Additionally I can not say things I don't feel 100% and as a result will sometimes seem kinda odd in an effort to balance these rules.
To touch on that first rule, I think my responsibility for my words ends at my mouth not the other persons ears. Now I use judgement here, I mean, I don't go into McDonalds telling over weight people they're gonna die. If I can spare feelings I will but people that know me know not to ask if they don't wanna hear what I really think.
The Karma thing comes down to something simple. Often times in an effort to help people we're not helping them at all! Classic example would be enabling an alcoholic however if you break that down a little further, it applies to many things that seem like your helping others. So if somebody asks me something I think they need to learn on their own sometimes I won't help and it comes off as cold and mean.
Lastly, since I won't lie about what I think and seemingly cant pretend to feel or think something I don't. If a woman gets a new haircut and asks me what I think, if I don't like it I'm going to be honest. I don't do the whole half compliment hope you didn't notice the other side of that. I will just say "I liked it better before but hell, it's hair, you try something new and if you don't like it it'll grow back". That may seem rude but if you look at and apply my other rules it may give you some understanding.