This “gentleman” is using the very direct approach. Supposedly, if it works even a tiny fraction of the time, it does mean the strategist will get laid, and the advantage is that time and money on extraneous things like tickets, meals, cab fares, gas and so on are saved by finding someone who will forgo building up to sex, etc. As a strategy, it’s been around forever, so it’s not a reliable indicator of the end of civilization. However, one of the disadvantages is that one might get decked frequently.
In the book “MASH” (that was made into a movie) there is an anesthetist named Me Lay Marston who used this strategy by walking up to a woman in a bar and saying “Me lay, you lay?” Thus, his nickname. Your example is covering a wider area than just personal encounters in bars.
I can’t imagine it works even sporadically. I mean, what girl wants an advertised “one-nite stand” after she went on a date to a Zoo or the library?
On the other hand…seeing some of the specimen of current maidens…I withhold my statement