Colonel Brutus was a man of culture.
He was a man with extremely wild sexual fantasies, and unlike other men who had similar fantasies, he actually had the skill to back it up.
When he decided to concoct 2 bottles of the Ultimate Pleasure Potion, Brutus had a reason for it. And there was also a reason why he gave the lesser quality one to his disciple, Cedric, keeping the other one for himself.
Brutus wanted to help Cedric have a great night, but he was no Saint who thought of others without thinking of himself first.
Personally, he also wanted to have a mind-blowing night.
Unlike when he just jumped back in time, as a mortal with no power, no woman, he was different now.
He may not be at the heights of his future self as the Lord of Profanity yet, but he had 3 women of extremely high quality in his harem already.
