Why are praying mantis so friendly?

I lived in FL for 2 years, and had something like this happen to me, but with lizards. In my apt I had 3 lizards from out side living with me. I didnt mind because if there were any bugs at all, they would eat them. And when they completely cleaned the apt of bugs and didnt have anything to eat, I fed them baloney. I would toss small bits of it onto the floor and watch the 3 of them come out from under everything , lol. But as time went on, I would fall asleep on the couch and wake up with them on me. Most of the time on my chest.
My guess was they were hungry so I fed them when I found them like that.
They were very cool, when I sat down and had something to eat for my self, no matter what it was, they would always try and at least taste it. I live in NY now, and I will always miss them.