>>3872225IDK about pheromones, but armpit and groin smell is from the more oily sweat produced in those areas being broken down by bacteria into smelly waste products.
Feet smell is caused by bacteria that grow well in very moist salty conditions. These feed on things like dead skin cells, and their waste products are made from breaking down proteins, especially those that contain sulfur.
The same bacteria are also present in the salty and humid conditions in cheese making which results in similar smell between feet and cheese.