Any yaoi which involves lots of different sex toys? Most of the mangas I've read only uses...

http://www.mangago.zone/tag/sex+toys/
you can pick from there ^^

also i have a personal favorite
http://www.mangago.zone/read-manga/yume_no_you_na_hanashi/

i like this one. most fun pure smut manga with sex toys as one of it's major premise http://www.mangago.zone/read-manga/h_jigyoubu_eigyou_ni_ka/