When you see lions on the move it is invariably a great thrill, but mostly when you come across them they are taking time out. It's almost like watching the grass grow. They stretch out and sleep and generally take it easy and you can sit and watch them for hours and nothing happens other than changing positions and getting more comfortable.
But even so, if you choose your moment you can get some gems, because they are after all still cats.
Like domestic cats they do have a need to press up against another living being.