The above image is from the first Mickey Mouse feature, Plane Crazy. The cartoon was created by Walt Disney and Ub Iwerks and was released in 1928. When I watch the cartoon, what first strikes me is the realization that Walt and Ub were only twenty-seven years old at the time. That makes this the work of young, virile men who are feeling their oats.
Note how Mickey's ears pop off from fear. Its cute and hilarious. Also that Mickey and Minnie are far looser, more frenetic and crazier than what came later when Mickey and Minnie became staid citizens of cartoon land.
Then take a look (below) as Mickey Mouse aggressively flirts with young Minnie. This version of Mickey has a lot of testosterone. Minnie is flattered, shy and liking and liking whatever Mickey is selling.