Finn knocks Shrimpo out and pulls him to his basement, ties him up to a chair and kisses his forehead, after that he waits for him to wake up, once he does he grabs one of those hypnotizing watches(Google failed me;c), he hypnotizes Shrimpo to love him

Shrimpo: "W-WHAT ARE YOU—….doing…"

Finn: "You love me don’t you..~?"