SyberianLynx said:
Sometimes I wish there was a quick, science-approved test to know your exact sexual orientation.

"Yeah, you're bisexual, you can try dating the opposite sex"
or
"No, you're gay, you like women aesthetically but that's it"
and etc.

This will likely happen in 20 years or so, and it will make life so much easier

20 is too generous, given how hard it is to pin down psychology in general. It might be that our current paradigm of sexuality doesn't even closely map to reality so such a thing is just impossible.