Perhaps it was seeing all the combinations and recombinations of couples coupling and uncoupling in a large building full of rooms to rent that gave him his jaundiced view of humanity.

jaundiced (adj) 1: (archaic) showing or experiencing a state of disordered feeling or distorted judgment as through bitterness or melancholy [syn: yellow] 2: affected by jaundice which causes yellowing of skin etc 3: showing or affected by prejudice or envy or distaste – source: The One Who Liked It Hot