No denying eating raw hash will get you high if you eat enough...
But are people seriously saying theres no need to cook it in fat/oil first? sure maybe you don't NEED to - if your the kind of person who enjoys throwing money away and using like 5x as much as needed then yeah, eat it raw ¬_¬
Cooking hash does not make it any stronger in my experience. I would just add a little boiling water to the hash in a cup, from the point of view of destroying any bacteria or germs, which are unlikely to exist in proper hash anyway, and drink it at meal times. If your hash is an oily type of hash that is already high in THC, then cooking it is actually more likely to weaken the effects. So if you must cook it in a recipe, then do so only minimally because there really is no advantage of making it stronger.