Hi guys Can y'll please help me find this manga, The mc is a manga artist, one time he go...

Hi guys
Can y'll please help me find this manga,
The mc is a manga artist, one time he got caught masturbating by a delivery rider while delivering his package, he said he was doing that for research purposes for his manga

Now and then everytime the delivery rider deliver something at his place, he always caught him doing that. So the manga artist gave him some 3 different manga asking his opinion after reading it.

Later that night the delivery rider couldn't sleep so he tried reading one of the manga, he found himself aroused and then he masturbated.

This is all I can remember T_T
It's been so long and I can't find it T_T
Please help, I'm not sure if a read it here in mangago or in myreadingmanga.