direct question will lead to direct answer
what comes to this explaining my reasoning, im happy to do that, but once i think that i have proven myself to you to be worthy of listening in some particular thing, i find it bit offensive if you start to question my reasoning about that particular thing. for example if someone would constantly ask me things about math(im not good at math but ill just use it as an example), (and lets pretend that you just want the answer not the reasoning because you would need to learn math) and i would have proved(in my mind) to be worthy of listening when it comes to math(always told you the correct answer even to the toughest calculations easily) and then you ask how much is 2+3, i tell its 5 and then you ask me why is it 5, its like asking me are you sure about it and asking me if im sure if 2+3 is 5 feels like you would be really underestimating me on some of my expertise, therefore i find it quite offensive. and its not about the thing actually being that simple as 2+3, but the thing that you are asking could very well be that simple to me.
if an intp makes some effort for you, like bakes you cookies or something. it is a big deal for him, because if he really likes you he will most likely want to put alot of effort for it, and even tho they might seem like an ordinary cookies they are most likely baked by someone who doesent normally bake, and i wouldnt wonder if the intp would have searched for hours for the perfect recipe and they will be done just perfectly(like exactly the right amount time in the oven(that might not be the one in the recipe, but will be achieved by constantly watching them bake), correct amount of chocolate(or what ever) that has been really thought thru etc etc). and to achieve the perfectness in them, you have to eat them when they are still warm. so cookies(or basically making pretty much any kind of effort) baked by your intp arent just cookies! they are an expression of our love to you showed trough Fe and showing that kind of Fe is a really big deal to us and usually we are bit hesitant to do this kind of stuff(because we want it to be perfect in every way and usually wont do it if we arent sure that this isnt the perfect way, we wont do it), so if you wont appreciate it or understand that those cookies are more than just cookies it really hurts. if you dont like the cookies, feel free to express it, but remember to show appreciation to our effort of showing how much we care about you.
if an intp gets excited about something and shows it to you, DO NOT ignore it. we often hesitate of showing that kind of stuff(at least to people that we havent done that much) to others and if you ignore it, we hesitate to show it the next time even more, if you keep ignoring it, things might get to the point where we dont see any point of even being with you because we cant share this kind of stuff to you that we dont usually show to people that easily.
if you are enfp(or maybe esfp), you showing your Te when you are pissed off might seem more scary to us than you would believe. even if you dont mean it in that bad way(the we might perceive it) or even you arent pissed off at us, it might seem worse to us than it actually is. because if you(as an F) show Te to us in negative form, it feels like we would show Fe at you when we are angry. and since Fe is our inferior function we dont show it as easily as you show your Te, it creates an impressions that there might be more going on than there actually is.
dunno what else to add for now