Nekkid

Every day I ride to work, carry my bike up the stairs, and enter my office at 8am.
I get a glass of cold water, switch on the fan and take a first look at my emails and try to cool down.
Then I pull the blind down and stand as far into the corner as I can to change clothes. I change everything; fresh bra, undies, shirt, everything. I always wonder if someone has seen me as I'm looking down to pull my pants on or fasten my bra.
Just now, I went to close the window as it's starting to heat up and I saw a guy in his bright orange jocks climbing into his suit pants in the office downstairs. He must ride to work too. He must think no-one can see him.