I've noticed a lot of really loud 'smooching' sounds around town lately.
For example, every morning we walk by a road construction crew and as we pass there is inevitably several loud SMOOCH sounds from the working men. I notice it if I park outside of the grocery store parking lot as there's a new apartment going up and generally a lot of men around and even as I stood on the street waiting for a friend to pick me up, taxis slowed and men SMOOCHed out the open window.
Annoyed, I brought it up to Joe a few months back and he said one of his local colleagues SMOOCHed him on the platform, apparently to get his attention. It bothered him as well.
So I've come to the conclusion that a SMOOCH must be the equivalent to the whistle in North America (and perhaps elsewhere.) You can use a loud whistle to get someone, or a group's, attention or the whistle we all know if you want to express that someone is good-lookin.
I tend to find it bothersome and not at all flattering (especially when I'm dripping in sweat at 8 am) - as do most of my friends.
Men, can't you think of a more pleasant way to get women's attention?