can someone remind me the deal with the alcohol? i’ve forgetten,,,

I think it helps him finish faster? or gets him hard? something along the lines of one of those two.

It's not clearly stated in the story but Caesar is a beast who needs like ten person a night to take him on and even then he drinks a lot of alcohol, I guess so that he would be tamer and less strong - which means if he doesn't he may well kill Lee Won with sex (that's what is said in the story and NOT what I believe, because I believe everyone can control themselves and maybe should consult a therapist if they can't)