"Certainly the legislature has a legitimate purpose in protecting all children, regardless of their sex, from sexual predators. It is a rational means to further that purpose to prevent adults from touching certain body parts of children with the intent to arouse and gratify sexual desires. The legislature rationally could have concluded children of either sex will suffer emotional harm, and be placed at significant risk of physical harm, if the law allowed those with pedophilic tendencies to touch the breasts of either male or female children. Additionally, as the legislative history shows, the legislature also was concerned that the failure to provide the same protection for male children as female children could render the legislation subject to attack on equal protection grounds."
In short, all things being equal in the eyes of the law, boys have breasts too. Remember, the purpose of the is to curb the use of children to arouse and gratify adult sexual desires. That's exactly what your guy was doing. (This assumes you can sufficiently prove his intent.)
Women don't own 100% of the market on breasts, just 99%.