I think, therefore, we have every reason to conclude that exogamy is one expression of the more restless and energetic habit of the male. It is psychologically true that only the unfamiliar and not-completely-controlled is interesting. This is the secret of the interest of modern scientific pursuit and of games. States of high emotional tension are due to the presentation of the unfamiliar--that is, the unanalyzed, the uncontrolled--to the attention. And although the intimate association and daily familiarity of family life produce affection, they are not favorable to the genesis of romantic love. Cognition is so complete that no place is left for emotional appreciation. Our common expressions "falling in love" and "love at sight" imply, in fact, unfamiliarity; and there can be no question that men and women would prefer at present to get mates away from home, even if there were no traditional prejudice against the marriage of near kin. THE PSYCHOLOGY OF MODESTY AND CLOTHING No altogether satisfactory theory of the origin of modesty has been advanced. The naïve assumption that men were ashamed because they were naked, and clothed themselves to hide their nakedness, is not tenable in face of the large mass of evidence that many of the natural races are naked, and not ashamed of their nakedness; and a much stronger case can be made out for the contrary view, that clothing was first worn as a mode of attraction, and modesty then attached to the act of removing the clothing; but this view in turn does not explain an equally large number of cases of modesty among races which wear no clothing at all. A third theory of modesty, the disgust theory, stated by Professor James[237] and developed somewhat by Havelock Ellis,[238] makes modesty the outgrowth of our disapproval of immodesty in others--"the application in the second instance to ourselves of judgments primarily passed upon our mates."[239] The sight of offensive behavior is no doubt a powerful deterrent from like behavior, but this seems to be a secondary manifestation in the case of modesty. The genesis of modesty is rather to be found in the activity in the midst of which it appears, and not in the inhibition of activity like the activity of others. It appears also that it has primarily no connection with clothing whatever.[240] Professor Angell and Miss Thompson have made an investigation of the relation of circulation and respiration to attention, which advances considerably our knowledge of the nature of the emotions. They say: