Arghhhh why did I have to forget the title

Does anyone know a manhwa(yaoi) where MC is called a sexgizer because he slept with a tons of people back then but something happened he couldn't get it up anymore haha he believes the cause of it is because he went to church with his mother and yeah whatever it is that the priest said I forgot struck him haha and so after that he became a tattoo Artist then one day ML showed up in his shop to tattoo his body of his dead pet dog then MC the moment he saw his fucking hot customer a miracle happened when he thought he couldn't get it up anymore ohmy he was so wrong haha and later on they found out that their actually friends in high school they just forgot what each other looks like oh wait MC didn't forget he just couldn't recognize him because ML lost his weight so he became a little unrecognizable haha oh another thing is their each other's first love