Haruko Mizushima, posing as a young girl, infiltrates Castle Barjassil in the earlier by seducing King Anshar who wanted to marry her, and this is how she gets nearer to the king's treasure chamber to steal a important artifact.
The Ice King attempts to impress/seduce Princess Bubblegum by sneaking into her space with a literal pot of honey and pouring it on her waffles.