He was trying to relate to her to an extent. Eventually when she would try to talk about how she was feeling he’d start going on about Spider-Man and get all smiley talking about how everyone loves him instead of acknowledging what she was dealing with. And like yeah but he didn’t have to kiss her like there was no actual reason for that and he knew she’d see it
the “charity kiss” he could have just not done? like, remember in the lip synch battle between tom and zendaya, the hostess asks to do an upside down kiss (not knowing that Tom and Zendaya are secretly dating) and Tom… doesn’t? because it’s easier not to do something than it is to go out of your way to do something.