That word is with regard to the common belief in the danger of improprieties and scandal as a part of co-education. There is some danger in this respect; but not a serious or unavoidable one. Doubtless there would be occasional lapses in a double-sexed college; and so there are outside of schoolhouses and seminaries of learning. Even the church and the clergy are not exempt from reproach in such things. There are sects, professing to commingle religion and love, who illustrate the dangers of juxtaposition even in things holy. "No physiologist can well doubt that the holy kiss of love in such cases owes all its warmth to the sexual feeling which consciously or unconsciously inspires it, or that the mystical union of the sexes lies very close to a union that is nowise mystical, when it does not lead to madness."[31] There is less, or certainly no more danger in having the sexes unite at the repasts of knowledge, than, as Plautus bluntly puts it, having he wits and she wits recline at the repasts of fashion. Isolation is more likely to breed pruriency than commingling to provoke indulgence. The virtue of the cloister and the cell scarcely deserves the name. A girl has her honor in her own keeping. If she can be trusted with boys and men at the lecture-room and in church, she can be trusted with them at school and in college. Jean Paul says, "To insure modesty, I would advise the education of the sexes together; for two boys will preserve twelve girls, or two girls twelve boys, innocent amidst winks, jokes, and improprieties, merely by that instinctive sense which is the forerunner of matured modesty. But I will guarantee nothing in a school where girls are alone together, and still less when boys are." A certain amount of juxta-position is an advantage to each sex. More than a certain amount is an evil to both. Instinct and common sense can be safely left to draw the line of demarcation. At the same time it is well to remember that juxtaposition may be carried too far. Temptations enough beset the young, without adding to them. Let learning and purity go hand in hand. There are two considerations appertaining to this subject, which, although they do not belong to the physiology of the matter, deserve to be mentioned in this connection. One amounts to a practical prohibition, for the present at least, of the experiment of the special and appropriate co-education of the sexes; and the other is an inherent difficulty in the experiment itself. The former can be removed whenever those who heartily believe in the success of the experiment choose to get rid of it; and the latter by patient and intelligent effort.