* Stands for a boar producing lots of [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheramones|pheromones]] in [[Oral_Cavity_-_Salivary_Glands_-_Anatomy_%26_Physiology#Saliva|saliva]].
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* Stands for a boar producing lots of [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheramones|pheromones]] in [[Salivary_Glands_-_Anatomy_&_Physiology#Saliva|saliva]].
* Stands very firmly to be mounted, hence the 'back pressure test' is very reliable.
* Stands very firmly to be mounted, hence the 'back pressure test' is very reliable.
** But, becomes refractory after 10 minutes standing, then no visible response for 1-2 hours.
** But, becomes refractory after 10 minutes standing, then no visible response for 1-2 hours.