how do you bring up a fantasy you're actually nervous to share

theres this thing ive been wanting to bring up w him for ages and i cant figure out how to say it. its not weird or extreme its just like... a vulnerability thing. its something where if he laughs or says no in the wrong tone its gonna sting in a way i wont recover from quickly. weve been LS for 5 years and shared a lot of stuff but this one feels different. how do you bring up the scary fantasies? do you preface it w "i need you to be careful with how you respond to this" or does that just make it weirder? i keep almost saying it then chickening out... advice from people whove had to share something they were scared to share...

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