A slightly uncomfortable encounter while wearing a skirt

I usually wander about the house wearing a skirt or dress (being male and living alone at present), on a street where double-decker buses pass by. It’s rarely a problem since they drive straight through, and if I’m in an upstairs front room, I can hear them approaching and step aside just in time (Really don’t want to put up curtains). Tonight though, things went slightly awry; I got absorbed in what I was doing when I suddenly realized a bus had pulled up right outside my window. It must have been delayed by a parked car or someone crossing the road. So there I stood, wearing quite a lovely purple plaid skirt (see that’s not me BTW:-) ), with a man on the upper deck staring directly at me. I didn’t try to conceal myself (what was the point?) and honestly it doesn’t bother me much; we don’t know each other, he won’t remember me later, and it’ll just be an amusing anecdote for him, though I suspect it was slightly awkward for us both:-)