That was making sure Lugohshi's feelings for Haru were leigmtate instead of base instinct. Feeding, yes, but also lust in general... Remember, the treatment involved handing Lugoshi an all rabbit nudie magazine.
And yes, the two urges made things more complicated... But the eating thing was still often framed sexually.
For example, Melon's whole thing is that he's super ****ed up in part becuase his mother frequently abused him sexually... And also openly expressed he desire to eat him while doing so. And literally named him after food.