Some good explanatory comments last time this was posted:

https://discuss.online/post/39870945

I think the joke is that the humanoid robot might milk them a little bit too enthusiastically

It looks like he’s fantasizing about a duck to me

You think they’re talking about a person named Bob, but then you realize they released some creature onto the dance floor that was previously in the jar labelled “Bob”

The joke is that’s a famous phrase of Popeye’s, and Larson was imagining a very different context for where he’d use it

yֶהְיֶה אֲשֶׁר yֶהְיֶה

Some context on this comic:

Transcript (sketch):

He’s a lazy, insensitive slob that doesn’t give a hoot about my needs or anyone else’s and never even tries to open up or communicate whatsoever!

I yam what I yam