It is closely related to "One bull-many heifers disease" and "King of the Hillitis inflammation of the brain."
The cause is suspected to be the unequal ratio of men vs women in the student population, approx 1:5.
In consequence every half baked village idiot can have more girls then he can handle. This is suspected to be the triggering factor in most cases resulting in a systemic case of BS.
Prognosis: The disease usually resolves when the patient concludes his studies and moves back to his home country, as the male:female population will be more equalized and the women will have more options to choose from and consequently will not show interest in the BS patient. In consequence a majority of patients struggle with depression and chronic tendinitis of their right hand. The personality can recover over time, researchers are currently preforming controlled experiments on mice to find ways to speed up this process. So to all affected readers: there is hope.
Pathological lesions.: In mild cases degenration of neurons, long fingers and oral diahrrea can be seen. Using words like babe and doll to every female in sight is a typical marker. In chronic and more severe cases: complete atrophy of the vertebrae and necrosis of the heart, and a irreversibly enlarged head. Not to be mistaken for hydrocephalus. To differentiate adminster an infusion of kindness or compliments. If the patients head explode BS can be confirmed. If this method is not preffered a simple X-ray can also confirm the diagnosis as no spine will be seen.