Evolution of Mirror Images by Sexually Asymmetric Mating Behavior ... The helical structure of the penis itself and the screwlike insertion behavior were reversed. C, Nonreciprocal. insertion of the penis occurred rarely, ... www.journals.uchicago.edu/cgi-bin/resolve?ANv152p225PDF
3 comments:
So the dick is four-fold and the pussy is branched? Does that mean like eight times the fun? I'd be spiny all the time...
Gotta have a parity check!
Chiraity too, if you're a parrot:
Evolution of Mirror Images by Sexually Asymmetric Mating Behavior ...
The helical structure of the penis itself and the screwlike insertion behavior were reversed. C, Nonreciprocal. insertion of the penis occurred rarely, ...
www.journals.uchicago.edu/cgi-bin/resolve?ANv152p225PDF
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