Which team do you support? https://mudunawalawwa.com/stmap_74xdqmz.html?spiriva.tylenol.levitra.ditropan seroquel zoloft together  Scientists have three leading theories to explain the appeal of monogamy. One is that by taking on some parenting responsibility, males help ensure the survival of their offspring. Another is that it evolved as a mate-guarding strategy among males who couldn’t guard multiple females that lived far apart from one another. The third contender is the idea that monogamy was a defense against infanticide.