However, it would also stand to reason, under the same set of circumstances-- that there would have been a strong need for, and subsequent providence for, dealing with the "Consequences" of such eventualities.
Given that this is a technologically advanced culture (that was able to genetically engineer telepathic fire-breathing lizards), you would think that there would be great advances in contraception, and increased options for choice, when and where choice becomes capable of being asserted, even if that choice is after the fact.
You would also have to consider, that early in the development of the culture, there would have been strong drive to create technological or biochemical means of supressing such "mating drive" in the human counterparts, that could be offered proactively (EG, part of a willful daily regimen. Such as say, with modern birth control pills.)
The fact that such a thing was not even suggested speaks volumes about the narrative intent of the author. (It would be at least plausible that while the early culture would have been big on such options, later generations simply did not care as much, and it fell out of favor--or perhaps, that such work was undertaken, but no effective solution was found, or such measures disrupted the bond in dangerous ways. That would still give you the same basic social structures, but not have a glaring hole of omission. It is not the same as "it does not exist." It not existing in the narrative universe is an indicator that the author did not even consider this aspect of their world, and had their eyes "elsewhere". Ahem.)