Fans often fail to consider that what characters are saying is based on the characters limited knowledge not perfect godlike knowledge of all things.Indeed you would be correct it does never state that.
It does however state they do not eat, drink, sleep or reproduce sexually. There is no evidence they feel any kind of sexual impulses from any of their interactions throughout the show.
Could it just be suppressed by the white? The free Jem'Hadar or those struggling with withdrawls do not, even one going through accelerated puberty has no interest. So it is at least suppressed on a genetic level.
But then why leave it and just suppress it in the first place? If one is genetically engineering the perfect soldier race it seems best to just eliminate that all together. Should it activate you could potentially end up with one of your perfect soldiers creating a child and then no longer performing his duties the same way. Offspring are a distraction, offspring present a weakness, what if your Jem'Hadar rebels against you to protect it?
It just makes more sense to make them infertile to begin with. Hell it makes more sense to not make them anatomically correct. Genetalia is a vulnerable spot physically and without the need for food and drink also serves no purpose.
But that depends on if one only goes by what is stated on screen verbatim or in this case what is unsaid and allows for absolutely nothing to be interpretated.
How so? This thread and the negative online discourse that’s discussed therein (which is oftentimes driven by thinly-veiled racism, sexism, fatphobia and anti-queer sentiment) has literally been going on for months. This thread started way back in August, four months before you even said anything about Gina Yashere / Lura Thok.