Heredia produces pictures featuring mostly young men with a noticeable anal bias in the activities depicted. His explicit S&M torture scenes also feature young men, so young looking in some cases that I hesitated about including pictures. The air of innocence usually extends to the masters as well which doesn't really hit the button for me. The example shown here is a notable exception but it is otherwise very representative of his style.
His technique is based on simple outlines with single colour shading to delineate muscle shapes. His anatomy is realistic and tends towards slender physiques which is a refreshing change even if it reflects a preoccupation with youth. There's usually some nice detailing in clothes and restraint gear and I've included a detail of 'bad boy' which shows his skill rather well.