I am 95% sure that Morty has a foot fetish, and I have pictures and logic to prove it.

In Mortynight Run(s2e2), we meet an interdimensional cloud of gas named Fart.



Fart was about to be killed by Krombopulis Michael, but Morty saved him. Fart then says that he communicates through:

He then corrects himself, saying:

The first time I saw this, I wrote it off as something strange, but later in the episode, Fart attempts to discern the name of the place he needs to be returned to go back to his original dimension. Here, we learn that Fart’s telepathy seems to be focus based. Rick presumably thinks, very hard:

Seconds later, Fart is able to dig deeper and get the name:

Clearly, Fart initially can only telepathically get the surface layer of someone’s thoughts, their inner monologue or whatever. For Rick, it was focusing on “Get out of my head Fart know you’re in here”

Morty, however, was thinking of Jessica’s feet.

Maybe Morty was just nonsexually thinking of Jessica’s feet, but it’s likely not. Anyway, just a cool little tidbit I found on a rewatch.