People could rationally decide that prolonged relationships take up too much time and effort and that they'd much rather do other kinds of things. But most people are afraid of rejection.
Albert EllisFat is a barrier, a bellicose statement to others that, to some, justifies hostility in kind. The world says to the fat person, "Your fatness is an affront to me, so we have the right to treat you as offensively as you appear." Fat is not merely viewed as another type of tissue, but as a diagnostic sign, a personal statement, and a measure of personality. Too little fat and we see you as being antisocial, fearful and sexless. Too much fat and we see you as slothful, stupid, and sexually hung up.
Albert EllisThinking rationally is often different from "positive thinking," in that it is a realistic assessment of the situation, with a view towards rectifying the problem if possible.
Albert Ellis