A hard day

You arrive just in time for the start of the math class.

"Ok students, today we are going to work on density. To determine the mass of an object, we can use their density and their volume, using the formula mass = volume * density. So in order to determine the mass of an object, you don't need a balance, just to know the density of what this object is made of, and its volume.

For example, a cylinder's volume is equal to pi times its radius squared times its length. So the wider a cylinder is, or the longer it is, the heavier. A very long and wide cylinder is massive. "

As the teacher was explaining her lesson, you could think of nothing else than the long and wide massive cock of your landlord. Your cock began to strain against the chastity cage. You tried to focus back on the class, you looked at the board and saw that the professor was now talking about spheres.

"So now that we have seen how to calculate the mass of a sphere tell me, for the same radius, what is more massive. A 15inch long cylindrical shaft or two spherical balls ?"

How could you think of anything else than your landlord's massive cock and balls ? This professor had to be doing this on purpose.

After a long day of things like that, you came back to the apartment mentally exhausted. Your dick, locked in this tight chastity cage, unable to go hard despite all the stimulation of your imagination, hurt a lot. But finally it was over and you could go to your room and relax.

You opened the door of the apartement and the first thing you saw was your landlord in the bathroom, the door wide open, completly naked, putting on makeup. Completly naked meant that of course her heavy equipment was out in the open. You quickly went to your room, your dick hurting once more.

"Silass, I heard you coming in. I'm going out with some friends, I'll be coming back late. Bye see you." she told you as she left the apartment.