On day 3, the rouge that uses a whip stops by. No matter what she carries, it always requires a boob potion. Is that intentional? 
The whip is a Melee (warrior) weapon. I confused that too.
Invisible dagger bug(I think), the whip is a rope weapon (said by the CoderGuy111)
Whip is a melee weapon AND a rope. Melee just means “close ranged weapon”.