i remember reading this story about this young master character who transmigrated into a famous clan and he was trying to hide/not develop his talent so he wouldn't. have to cultivate and just be a young master but then it turns out he has the Yin body and his parents say no sex till nascent soul or you die but i didnt the novel was that good oh i found the link https://www.royalroad.com/fiction/35841/pure-yin-body-but-im-a-man its on royalroad
There is three that I know. One is My Balls who have the demon queen sealed in his balls and ejaculating will release her that would mean end of world. Dragon Rioting where the protagonist has this medical condition where if he get a hard on his heart stop or something .He got enrolled in a fighting school with lots of women. Other one is his ejaculation produce a crystal that is worth a lot but it will cause his life to end(not mention painful as a kidney stone)if he produce another and the gold diggers want it. It didn't help that he became very attractive to women