On a sleeper car heading to the German Alps to ski...
On the shore of the Mediterranean under a poncho (only our heads visible through the neck hole) in broad daylight and plain sight, as folks walked by on the trail above.
In the strip club on a few occasions during private dances...
In my office while working at a college with students outside working in the outer office.
In the office of a health care provider during the business day...
In a studio of a Web porn company in front of about a 100 folks watching while also being broadcast live on the web... (as seen below and in my avatar)