Just a bit of context before you start commenting down below:
"The handkerchief code (also known as the hanky code, the bandana code, and flagging) is a color-coded system, employed usually among the gay male casual-sex seekers or BDSM practitioners in the United States, Canada, Australia and Europe, to indicate preferred sexual fetishes, what kind of sex they are seeking, and whether they are a top/dominant or bottom/submissive."
Knowing this, one of Pichu's alternative costumes in Super Smash Bros. Ultimate features a red handkerchief around his left ear. Using the code, we can determine that canonically:
Pichu is dominant when it comes to fisting.
I decided to take this revolution further by drawing this piece, along with 2 cum variations to follow.