Yes
I would say so
As a postscript... this afternoon I checked with three of my good buddies (all male, all same age as I am), and questioned them as to whether they had ever witnessed a “public” sex act. Nope. Like me, none of them had. And these aren’t particularly cloistered guys. Average redneck joes.
Semi-related: none of us have ever seen two homos swapping swit in public, either. Just on tv.