>>32328681NTA but some artists use stuff such as clothing and even swimsuit catalogs to get references for their art and I even saw an artist posting images of a child wearing a sukumizu on Twitter, but despite what you might think that doesn't mean that they're staring at the child, they are just taking reference from the clothes
However, some artists take reference from junior gravure or even CP, but Japanese communities more often than not frown upon such things (too bad that the law around it can create loopholes)