Have you ever noticed those two could be brother/sister! I guess he likes making out with someone who looks like him in a mirror.
That (picking a lover who looks like a sibling) seems to happen quite a lot. I’m guessing it’s like chosing to mate with someone who appears to be from the same genetic ‘tribe’.
Then there are others who will go out of their way to chose someone with the polar opposite features of their family.
For some, opposites are more exotic, mysterious and thus, more attractive.