Boyfriend found out I've dated a few black in my past& is upset, how do I get him to see it was just a fun novelty & his size is fine?

& I had no real intrest in a relationship or marraige with them and it is all in the past.

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It was purely sexual. It's no different than when I use a large dildo
Boyfriend found out I've dated a few black in my past& is upset, how do I get him to see it was just a fun novelty & his size is fine?
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