(Portland, OR)  --  Police are looking for a man who reportedly exposed himself to women at businesses in Southeast Portland.  Investigators say the latest such incident happened Friday at a store on Southeast 17th Avenue and Hawthorne Boulevard.  Police say the suspect is described as an African-American man in his late teens or early 20s, standing five-feet-ten and weighing 130 pounds.  Authorities say similar incidents have been reported at businesses on Southeast 47th Avenue and Southeast 13th Avenue.