With the infusion of various flesh and blood knowledge in his mind, Herbert analyzed the various parameters of the dragon's human form at a rather astonishing speed.
If he had some Monster Girl research system, then probably all kinds of prompts would be popping up wildly in front of him by now.
[Giant Dragon Ecology +1]
[Knowledge of the Dragon Incarnation +1]
[Research on the physiological structure of dragons (human form) +1]
[Knowledge of Dragon Forms +1]
[After some in-depth research, you successfully mastered some quite secret knowledge after serving a mature female giant dragon to sleep, drenched in sweat!]
[Now, you can call yourself a standout with a unique understanding of the "Path of the Giant Dragon"!]
...
But unfortunately, Herbert did not have that kind of convenient system.
All he could rely on was his own effort and sweat.
Heaven rewards diligence!
Only diligence will not betray sweat, and that is the true shortcut to success!