"You all are a nice couple"

Says random black dude as we walk past. I look black and my boyfriend is white. I was kinda happy bouncy walking in leggings so there's also the potential this dude was looking at my butt. As we walked away he said "no thanks?" several times, as in "why didn't you say thanks?"

What do yall make of this? Interracial thing? Leggings thing? Both? Neither?