Black and white, raw and cooked, sick and healthy, we and them, animals and humans, good and bad: we have a strong tendency to pigeonhole our world in dualistic categories. This is particularly true with respect to dimensions related to gender and sexuality. Who doesn't think in "male and female" or "straight and gay"? Such a binary approach to life is certainly practical, allows us to make fast decisions and provides some sense of security. However, dichotomous structures are social constructs and do not correctly reflect physical or biological realities. The "real world" is fuzzy, full of gradualism. In this talk, we will explore the sexuality of our monkey and ape relatives, asking whether they, too, relate to one another in binary terms.