* Generally acquire reproductive behavioural traits such as mounting and [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Erection|erection]] a long time before they acquire the ability to ejaculate and produce spermatozoa. | * Generally acquire reproductive behavioural traits such as mounting and [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Erection|erection]] a long time before they acquire the ability to ejaculate and produce spermatozoa. |