He won't teach me anything!!

Me and my boyfriend have been living together for a year and whenever I ask, say I ask how to cook a certain meal or what are the best spices to go on it (he use to cook in restaurants so he knows) well he will not tell me!!! He won't help me. I've asked him what ingredients were in a meal that he's cooked for me, he always says "it doesn't matter." I am just trying to learn damn it!! I've asked him how to hook up a game system, he won't tell me. I could literally ask him how to do anything and he won't tell me even when he knows. He's 9 years older than me so maybe he just wants me to figure things out myself, but I feel that a relationship should help each other learn and grow. Am I right? It's fusterating when he refuses to teach me anything. I teach him things when he asks even when he asks stupid questions like "what's a UTI?" I won't make him feel bad for not knowing, I just educate him.