Mort is probably equally freaked out by Rodeo's ability to NOT HAVE FUN. And he would never stoop so low as to make biting motions at Rodeo or whatever! Never!
Mort would have such a crush on Lucky and be all 'so you know about the dead, eh?' He'd keep on trying to flirt with him and try to curb his more enthusiastic tendencies.
Mort, on his end, would try to restrain Harlow, just a little, ever so often, and be like "NO LET'S NOT CON THESE PEOPLE THESE MUFFINS ARE GOOD." But I do think they'd get into far too much trouble.