Sweetheart you might want to look up the definitions when it comes to sexual sadism in S&M and BDSM. Sexual sadism, outside of S&M or BDSM, can be very dangerous. But those that follow S&M and BDSM have rules that rely on trust and mutual respect of each other. No dominant would take so little time to prepare their male partner for anal sex because a tear in that area can literally kill a person. So even a sadist would prepare their partner properly, unless they didn't care about killing them.
You're welcome. You might wanna dance to it too https://www.youtube.com/watch?v=9Y_2snD9nrY

Full offence: how come the owner of a brothel isn't using lube before entering someone's asshole? Especially if it's their first time? And why did he spend so little time prepping him anyway?
Hyungdo said he was amazing but I'm afraid he's just dickmatized atm and hasn't realised that he's mingling with a lousy, arrogant top.