Need for spontaneous intimacy

*Please read my whole post so you can help give me the best advice.

My husband doesn't seem to understand why i need him to sometimes just take me and be spontaneous with sex. Ive tried to blatantly explain it to him. I dont know if he just doesnt want to be spontaneous or he doesn't get how to do it. Any advice of how i can get this fire in my marriage lit?

Most of the time if we have spontaneous sex its me that initiated it, it would be nice for him to initiate it sometimes because it would put me in the mood a lot easier. He usually wants to plan out when we have sex which isn't really that fun. Planning it out makes it seem like he's just fulfilling a 'husbandly duty' and not wanting to have sex.

So what can i do to try and get him to understand my need and want to fulfill it?