The concept came from a joke with my partner, when I was washing my kimono and added some disinfectant we use for our pets towels and covers.

Pitbulls are a recurring theme among fighters, specially in BJJ, so I said "we use it for our pets, I think it's good for the pitbull here" XD or something alike

IRL I'm a bit tall and big and somewhere muscular and my expression sometimes may scare people around a bit because I look too serious xD but I'm a good boy so it's also a joke on this impression I may give for those who doesn't know me