Of course. You said you know Jojo? Joseph. [...] Joseph Joestar. When you get back, I want you to tell him something for me. [Because it's a when and not an if.

...if it was Caesar that was doing the delivery he'd probably have a different message: if Joseph were to pop up, he'd probably have a completely different delivery entirely. (If Joseph were to pop up right that second, it would probably involve a fist.) But...] 'Thank you.' I want you to tell him that.

[When you were asking someone else to pass along a message, there really was only one choice.]