Site question

Hi,I'm not sure if this is the right place to ask this question,if it isn't I apologize but couldn't find another section that fit better. I was wondering why there isn't a way to attach photos in the private message sections? In the normal.disxussio. threads and even the wanted ads all you have to to is click "attach" and you can ad photos,for some reason there's no way to do that in the P.M feature.