From Steven Carlo:

Re: Study: red enhances men’s attraction to women (Oct. 29): As a human male I agree totally, but something is to be said for black as well! The reason I am writing is regarding a paper I read in The Journal of Experimental Biology 207, 2157-2172. It has some interesting pictures of mandrills, velvet monkey and male mouse opossum. What is interesting is their penises as are the female rumps are bright red. But their scrotums are blue to cyan. The male mandrill also has a blue nose, but red nostrils. Perhaps the color difference is a way of enhancing contrast? After all on the CieLAB scale red and blue are on the same “line”.

Steven Carlo, PhD, C.Chem, MRSC.
Senior Scientist
Exponent
17000 Science Drive, Suite 200
Bowie, MD 20715