[ Crowley understands that it's a metaphor, but he also understands that Blake has clearly never used a bloody sewing machine if he thinks that would work. ]

For the purposes of your analogy, let's say that I couldn't, because I don't think being pedantic will serve us well here.

[ Crowley isn't always the most patient soul. He can play a long con and he can bide his time, but this sort of patience is a struggle for him. Still, Blake is worth the struggle and he can recognize that easily enough. ]