How about not hashing out the whys and the hows after only one date?
So, in response to your query about how to tell someone that it’s the lack of chemistry that’s the reason for blowing someone off, how about this novel idea: How about you don’t say anything?
My personal policy has been to NEVER tell a woman what I think is “wrong” with her.
That’s how the vast majority of first and second dates go.
No, for the most part, the first dates that don’t turn into second dates are all going to fall under the umbrella of “lack of chemistry.” So what’s the value of discussing it?