Responses
Umm.. I've never seen in sex scene. Mostly it's whenever characters see something fantastic and they love it..
http://www.mangago.zone/read-manga/honto_yajuu/mf/656e612e6fc744252ee0c8e1a27b93a1_chapter-5/pg-33/
it's in a lot of hentai mangas or doujins. it's not a thing in yaoi mangas.
When I'm reading a smut, yaoi manga , I come across mangas where ukes have hearts in there eyes when they are feelings so good in sex. Does anyone beside me find that hot? And does anyone know a manga that has that?