I have pet some of my tarantulas before. Usually I run the back of my finger down their leg or something. Never the abdomen though. I once calmed down my really skittish Brachypelma hamorii by petting her on the leg. I have also pet my Ephebopus murinus. She got spooked when I touched her but she soon relaxed. But what I find interesting is that they don’t really mind it. My Skeleton barely reacted once she knew what I was doing. This is gonna sound far fetched but what if they like it? What do you guys think?