Intriguing. But can a single request constitute harassment if by definition harassment entails dogged persistence?
Single request? From the reports we've received, it rather appears that you have a policy of sending PM's like this to every new young woman who arrives on the forum.
Now perhaps I'm too prudish, but I would have thought that propositioning girls half your age, by private message, without any introduction, would generally be considered to be conduct unbecoming.
Since some of the girls concerned seem to concur, I would suggest that you desist if you wish to retain the ablity to send PM's at all. Desisting without being forced to would make everyone happier.
Devious, treacherous, murderous, neanderthal, sub-human of the West.