I would guess you're correct (I'd still be interested to see data) for long-term relationships but I wouldn't agree with you on short-term attraction i.e. seein

I would guess you're correct (I'd still be interested to see data) for long-term relationships but I wouldn't agree with you on short-term attraction i.e. seeing people on the street and finding them attractive. This is purely physical (even non-physical aspects e.g. associating someone's appearance with a certain type of personality have a physical source) so it is possible hair/eye/skin color can matter, so whether people prefer people looking similar/dissimilar to them is still an open question, I think. EDIT: But of course, since we're talking about reproduction, you have a good point I think.