I've had fairly good experiences with my co-workers and commuting. Most people are impressed I ride 20km to work each day and I am normally met with comments like "Wow, how long does that take you!" when I reply around 40 minutes they normally say "that's how long I take to get to work!".

Only had one slightly awkward confrontation with a co-worker, I was in the lift and she was staring at my "package". After a long awkward silence, and about 5 floors in the lift she squeaked out "Nice........gear".