why did he get erect so quickly if that was actually not erection drug? ╮(￣▽￣)╭

He was horny

XD i get it that he was horny lol but how??? he was in the bathroom washing his face seme enters rubs against him and gives him peppermint and he tells him its an erection drug and he hard seconds later?even if it was placebo wffect how can ir take place so quickly. ┑(￣Д ￣)┍ wth maaaan idke