Transcendence! New Skill!

"System, after learning this skill, can I control whether to use it or not, or is it necessary to use it every time?" 

This must be clarified! 

If it's mandatory to use it every time, Alex will absolutely not learn this skill. The adverse reactions three days later, especially the irresistible addiction, are terrifying! 

Just considering Alex's current harem of female slaves, there are already hundreds of them. If all these people become addicted, he would end up serving them all day long. With the continuous increase in the harem team, Alex is genuinely afraid of digging his own grave.

Even the strongest physique can't withstand such a scenario, right? 

Fortunately, the system's prompt quickly eases Alex's concerns. 

[After learning this skill, the host can freely control whether to use it or not.] 

In that case, Alex decides to learn it. After all, if used properly, this skill could still be highly useful.