It can, but there are a lot of people studying causes of homosexuality nevertheless. And even if there weren't, if the back-of-the-envelope evidence points in

It can, but there are a lot of people studying causes of homosexuality nevertheless. And even if there weren't, if the back-of-the-envelope evidence points in the opposite direction (if there's any correlation at all between homosexuality and fungi in foods, it's that we're observing more people declare themselves to be homosexual in populations eating commercially produced and processed food screened for zearalenone which is the opposite of the expected result if zearalenone is the causal factor, and "outbreaks" of homosexuality amongst groups with shared diets simply aren't observed) it's not a theory with much in its favour.