boy cut underwear is really cute, its like regular underwear except it doesn't completely cover the back. here's a link http://www.lasenza.com/eng/categorysearch/redirect.cfm?sectionID=b2c/search/itemCategories/level1Homepage.cfm&itemCategoryLevel1=101&var=d
the girl in the yellow underwear, and the top right pic, those are boy cut underwear.