For boys who have girlfriends or girls who have have friends(or girls themselves) who suffered from period, there is one thing maybe a good choice as a gift. That is a heating belt whih can heat up by far-infrared intelligently. I bought one from emryshome (www.emryshome.com) after comparing from others, and found it was surprisingly applied. It helps me a lot because I felt less pain with it, and it in some way improved my cold hands and feet. I would choose it for a gift for my girlfriends.