Depends on who they are, if I knoe both of them. If its some random couple I'd think that the guys sweet if he can look past her face. And attractive isnt all sbout looks, its the personality thats the winner. If a guy was really hot but an absolute asshole, then I wouldnt give him a secondd glance, just like if a guy was covered in spots but reallly sweet, id consider going out with him.
If it was someone I know then it would depend on theyre personalities, not theyre looks. But if an attractive guy was hoing out with an inattractive girl, my first thiught would be, "why cant there be more guys like that?"