I don't think Vince is a scat fetishist. You have to understand, he's an old man. I believe the most likely scenario was he went to fart on her head because as we all know, Vince still has the sense of humour of a 12 year old and thought it would be funny. But of course, at his advanced age, he doesn't have a whole lot of control of his sphincter. And a fart ended up being a shart. This is probably the most unfortunate detail in these leaks because now everybody has the wrong impression of him. Quite frankly, it's ageism.