In both common usage and for research purposes , the word `` child '' in the phrase `` child pornography '' refers to prepubescent children , and does not refer to post-puberty teenagers .

In both common usage and for the purpose of research -LRB- looking up information -RRB- , the word `` child '' in the phrase `` child pornography '' refers to children before they reach puberty , and does not refer to post-puberty teenagers .
