Responses
http://www.mangago.zone/read-manga/souteigai_love_serendipity/
I think its this one
yes, it's exactly that. thanks so much (▰˘◡˘▰)
it's about a man who thinks his sex life when his partner is getting boring after so many years. so he confronts his work partner and he gives him a bunch of toys. his partner tries them but he/his partner ends up either laughing the entire time/messing up/or not enjoying it.