1. For step-by-step drawings of this development see Figure 3-3 in Money (1980).
2. One survey asked men and women how many sexual partners they would ideally like to have over various time intervals. The men’s preferences were three to four times higher than the women’s (Buss and Schmitt, 1993, p. 211).
3. For a study of male/female preferences of 37 peoples in 33 countries, see Fisher (1992, p. 47).
4. Walsh (1991, p. 182).
5. Buss and Schmitt (1993, p. 204).