The hymen or vaginal corona is a tissue, usually doughnut-shaped, inside the vagina. They don't "break" or bleed, but some of the hymen can stretch or tear. It is normal for some of the hymen to wear away due to normal activities such as bathing, masturbation, even just moving around or stretching. Contrary to popular belief, it is actually pretty unlikely that a hymen will be damaged by riding a bike or a horse, because all these activities really do is put pressure on the perineum, not interfere with the vagina itself. It does not completely cover the vagina; if it did, menstruation would be impossible for girls with intact hymens. By the time full PVI occurs, the hymen is (usually) already mostly worn away.
An employee whose aim is to climb up the corporate ladder by any means other than merit, including backstabbing, ass-licking, being a yes man, drastically changing opinion to suit circumstances, gossiping, bitching, corridor-talking, spreading lies, pitting colleagues against each other, spying and reporting on colleagues, etc.
Jack always sucks-up to his boss no matter what stupid ideas his boss comes up with, hoping to have an increase, what a corporate hyena!
Tom reports colleagues on any triviality so as to show he really cares for the company, hoping he will be the one to be promoted, what a corporate hyena!