This is part of the pro-homosexual propaganda that permeates the media. Children at 4 don't know who they are attracted to. 4 year old boys and girls aren't even attracted to the other sex yet. The deliberate sexualization of children and exposing children to homosexual propaganda is not an accident. It is a plan to create willing young sexual companions to the adult homosexuals who have so much power in the media. It is also a plan to isolate and demonize those who believe in traditional values.
At age 4, my kids were attracted to "The Lone Ranger" and "Hot Wheels Cars", respectively. Suppose I can get a grant to study them?
4 years old....jeez, I bet the publishers of this "study" don't have kids of their own. Or, they have an agenda. Or, both.