I don't think saying something like, 'I don't date clients' is rude or mean. Then you get the boring, lovestick-lamb bleating to change your mind.

I guess you still want their money but don't want to piss them off.
But he's imposing and nagging you isn't he?

Personally, I'd ignore, block and ban as it's likely some skewed obsession for romance or free sex and who needs the drama! But that's me.

Just say if you mean you want free appointments that is not something i offer. I only see clients for payment.

'No' is a complete sentence, so even just saying 'no, thank you' if a client asks you for a date is more than enough.

I'd probably do as saltysweet suggests and block him too.

Recently a client spent the majority of his ninety minute booking trying to persuade me out on a date, reassuring me that we'd have incredibly naughty fun... I'm not being funny but he was in his late fifties, was pretty vanilla, which is fine but my vids are pretty 'adventurous', and he's never even tried anal. To top it all off he wore a wedding ring and definitely had a wife at home