My boyfriend likes BBC

Hi, so a few weeks ago my boyfriend of two years admitted a fantasy to me. I listened and made sure he didn’t feel ashamed of it or pressured to tell me. But now I’m just I guess feeling slightly strange about it but like I understand it at the same time? He told me he likes Big Black Cocks, he clarified that he doesn’t find men attractive. He said maybe it’s because it’s big and doesn’t look like his as he is a white man.

Just wondering if this is anything anyone else has been through with their partner? I have no problem with it really I just feel uncomfortable at the thought that maybe that’s what he fantasies about when we have sex. Also I didn’t ask if it’s strictly to do with a women being penetrated or if it’s anything to do with him wanting his to be bigger and black? Because I didn’t want to embarrass or hurt his feelings.

I suggested him getting me and big black dildo to use for his fantasy and he said he’d like that. But I guess I just have more question of why he’s into them.