Im not sure who said it, but someone said " Looks attract the persons, personality keeps them together." This is true is most relationships. If you where browsing a site like collerme the first thing that would get you to take an interest in someone is how they look in their dp but it is what they say in their comment that mey interest you can get them to contact them.
So regarding looks it really only matters with the initial connection (since people aren't only attracted by looks) unless there is an ulterior motive behind the connection of M/s.