...because "chemical compatibility" is SOLELY detected & managed by the HLA system: https://en.wikipedia.org/wiki/Human_leukocyte_antigen

I write this in caps because people do not understand & believe. Its this part of your immune system that makes you high on someone. Then, far behind that, come whatever preferences/hobbies/specs.

And there is no dating app on earth built around this,because you cant - it would involve taking a genetic fingerprint from every user to build this metric)

(Source: Been in dating business for several years)