Godinotia is notable for being one of the oldest known primates, and also is apparently the only extinct primate ever for which a baculum - the penis bone - has been found (though others would have had this) The penis bone helps in sexual intercourse in mammals, and most mammals possess some form of baculum. Strangely, of all the primates, Humans are the only ones to lack a baculum. This means human males have to rely solely on blood pressure in a hydraulic fashion to achieve and maintain an erection. This is at some considerable cost to energy and has noted to become difficult as men age and become weaker. Without the baculum, this is a reason why erectile dysfunction occurs in many older males of our species, as any number of factors can change the blood pressure and health of the individual for the worst. Maintaining erections for humans is much more difficult with the 'stabilising rod' of the baculum. The Godinotia were, like most mammals still are today, solitary and as such would not form relationships whereby frequent sex with a single partner was assured. Therefore, sexual activity was only available to the male Godinotia when they randomly met females whilst foraging at night. Henceforth, the male had to be ready at all times to immediately engage in sexual intercourse whenever he sighted a female. Godinoia were probably very sexually active and rather rampant. Their baculum allowed them to have sex for a very long time, without fear of losing their erection due to fatigue. This ensured that it was his sperm that impregnated the female, as the act would take so much time that fertilisation would have occured if the female ovulating. This compensated for their solitary nature, which would perhaps otherwise leave them in danger of not passing on their genes efficiently, and it could be said that without the baculum, they could fail to ensure impregnation. This behaviour is evidenced with their relatives that survive to this day - the Bush Babies, Marmosets and Tarsiers. These are solitary, and behave in exactly the way described in suggestion for Godinotia. Godinotia were probably most vulnerable when drinking from lakes and rivers - as they could have easily fallen prey when ambushed, to large crocodiles and the bizarre 3 metre long ancient whale, Ambulocetus.