https://www.hrw.org/reports/2008/us0808/8.htm#_Toc206220358

According to a Human Rights Watch report called a Violent Education, boys are 78% of the students paddled in schools. According to the report, boys are more likely to be paddled, and are paddled much harsher than girls

Boys are subjected to corporal punishment at much higher rates than girls: nationwide, boys make up 78.3 percent of those paddled, while girls make up 21.7 percent.320 Boys are paddled more than girls in all states that use corporal punishment. For instance, in Mississippi, 74.2 percent of those paddled in schools are boys, while in Texas, 78.7 percent of those paddled are boys.321

One high school teacher suggested one possible reason for the gender disparity in paddling, noting that at her school it was common practice to “stay away from hitting the girls. I guess they’re more fragile, and a lot of them could be pregnant and we wouldn’t know it.”322 A father of two boys and a girl felt that it was more acceptable for boys to be paddled than girls. He explained, “My little girl—don’t you put your hands on her…. As far as my boys, I am super hard on them. For one, they are young black men and they are faced with different obstacles in life. I get on them every day, and I know they say, ‘Man, my dad is tough.’”323

Many interviewees reported that boys were beaten more harshly than girls. A middle school boy in Mississippi observed that one of his teachers “paddle the boys real hard and when he paddle the girls he don’t really hit them.”324 One student reported that there are smaller paddles for girls: “They use a short one for girls and a long one for the boys.”325 One middle school student, however, told us that “[s]ome girls that act fast like they’re gay or something … they’ll get hit real hard. When they be trying to feel other girls.”326

If you go down, you'll see that they don't want to hit girls because it is 'sexual'