Searching for Yaoi title

Eyoo! So I've read this manga before but I forgot the title ahaha. It's about a dude (uke) who's very troubled by the fact that he lacks sexual everything and wants to learn how to be sexual or something ( because someone told him he doesnt know how to have sex or something) then he called seme, a callboy, and asked seme to teach him how to have sex. The seme taught the uke some knowledge about sex and things happened that seme fell for uke. I've read like a year and a half ago.