Source: https://www.amazon.com/Love-Languages-Singles-Revolutionize-Relationships/dp/0802414818/ref=pd_sbs_14_4?_encoding=UTF8&pd_rd_i=0802414818&pd_rd_r=7W5XE311TBXHT71GN29W&pd_rd_w=SiWnN&pd_rd_wg=i1fLJ&psc=1&refRID=7W5XE311TBXHT71GN29W