This is what we’d expect, and I posted on this matter in October.
For example, if another female enters the picture and, for some unspecified reason, this other female seems to favor the drab male.
The average man, based on the histogram, appears to have been rated at about 1.4 stars (out of 5) by women. If 100 viewers watch a television show and their ratings of it average 3.7 stars, on a 1-to-5 scale, that’s not a “good” rating. (Expert raters and critics are more conservative in their grading; a 3-star film, according to Ebert, is not being rated as mediocre.) And what is the average GPA at Ivy League colleges (where there are few poor students who must be given failing grades)? In any case, the graph of male ratings of women shows absolutely no inflation.
The distribution of attractiveness ratings seems to show a symmetric, bell-shaped curve.
Guppies are small fish with brains of only a few millimeters in width, and so one wouldn't expect them to make complex mating decisions: Take for example the typical female Guppy who has to choose between two males; one a little drab, the other brightly colored.
For the typical female this situation presents a simple - practically hard-wired - call, and she will generally choose the brightly colored male.