Nothing illustrates an (abstract) concept better than contrasting examples.
Couples, in other words. (not just male-female, either.) Pairings of any sort.
While there will be volumes on the subject of why (why a clark and a scott or why a scott and a roger), this is about seeing what we are talking about. The goal of this page is to point to an example of behavior that we all see (equally) objectively.
So, lets get right down to it.
For your consideration I present:
Bill and Hillary (President)
(scott and roger)
Martin and Lewis
(roger and scott)
Scully and Muldur
(roger and clark)
Lennon and McCartney
(roger and roger)
Sigfried and Roy
Brennan and Booth (TV series ‘Bones’)
(clark and roger)
Romeo and Juliet
Tracy and Hepburn
(roger and scott)
Rob and Laura (Petrie)
(roger and roger)
Harry and Bess Truman (clark and roger)
George and Barbara Bush (clark and scott)