Ever tried to go out with a strap-on dildo in your pants? I did.
It happened a couple of years ago when me and a friend of mine decided to do the "role play". In order to get more excited and create a more realistic situation we went for a walk. She was wearing a short dress, while I put on a T-shirt and a pair of stretchy jeans for impressive effects (uh, naughty me).
That was hell of a fun looking at people's faces staring at my crotch. You could what they were thinking about only by their expressions: surprise, shock, envy, desire. Some of them were even blushing.
The adventure really helped us to relax and have a sleepless (well-deserved) kinky night.