Case for Non-monogamy: Penis Shape

Man: I'm in a polyam. We have all decided to have kids. But I'm scheduled to be the last one to engage in sex. I feel insecure that biologically the child wouldn't be related to me.

Nature: Well, that is not entirely true. Yes we have a saying "Nice guys do not finish last" but that is entirely Patriarchal, extremely Misogynistic and definitely Untrue.

References

1. Baker, R. R. and Bellis, M. A. (1995). Human sperm competition: Copulation, Masturbation, and Infidelity. Chapman and Hall, London.

2. Gallup, G. G., Burch, R. L., Zappieri, M. L., Parvez, R., Stockwell, M. and Davis, J. A. (2003). The human penis as a semen displacement device. Evolution and Human Behavior, 24, 277–289.

3. Gallup GG, Burch RL. Semen Displacement as a Sperm Competition Strategy in Humans. Evolutionary Psychology. January 2004. doi:10.1177/147470490400200105