explain even thoug i probly alrady know

矢追 would be guyxguy and Yuri is girlxgirl. These categories can go anywhere from a single 吻乐队（Kiss） to sex so be careful and research a show/manga before 你 watch/read it in case it has something 你 might feel uncomfortable seeing. Then there is Shounen-ai (Boys-love literally) which is still guyxguy but there is no sex 或者 harsher activity involved. Only kisses and snuggles are involved here. The same goes for Shoujo-ai (Girls-love). No sexual activity involved except for 接吻 and snuggling. =] Hope that helped!