Umm, any yaoi mangas with... urethra insertions... *cough* sorry and thank you. /////

This one comes to mind - http://www.mangago.zone/read-manga/hakui_no_shihaisha/

Why are you sorry? Lol:
http://www.mangago.zone/read-manga/datte_ai_ja_nai_/ (in chapter 7 I believe)
http://www.mangago.zone/read-manga/oshioki_gakuen/ (ch 3)
These might have it too if I remember correctly:
http://www.mangago.zone/read-manga/ginkaku_hakushi_to_marmot/
http://www.mangago.zone/read-manga/saikyou_no_love_magic/
http://www.mangago.zone/read-manga/chou_dakaretai_otoko/

Thank you again! (and I'm sorry for those that feel a little uncomfortable with this question, it's one thing to read it (alone) and another to ask/answer it)

XD I have the same fetish, try "You're My Prize in Viewfinder", it's only in one chapter but it's great

he he i want to read something like that too, i know one manga : Haretara kimi o mukae ni iku , you can read it here: http://mymangaonline.us/read-online/haretara-kimi-o-mukae-ni-iku-ch-1.html

also if you find any manga, plz let me know. ٩(๑❛ᴗ❛๑)۶

I'm still collecting but you can look up at my list for urethral play tags :)

http://www.mangago.zone/home/mangalist/98924/