Sherlock's one and only past partner was sadistic and abusive. He convinced Sherlock to wear chastity devices until Sherlock was trained to beg to be allowed to orgasm. Then, when Sherlock could hold back without the help, he still made Sherlock ask for permission. If Sherlock couldn't hold it, he would hit Sherlock and also, in particular Sherlock's genitals. Basically, he trained Sherlock to come only when given verbal permission.
(alternatively, that was one of the torture techniques when Sherlock was off in Serbia).
Anyway, John and Sherlock get together, have a normal, healthy, loving relationship. Except Sherlock always asks for permission to come. He finds that he has a mental block and can't actually orgasm without getting verbal permission first. John doesn't realise this, but it's fine because more often than not, John's the one telling Sherlock to "come for me" way before Sherlock needs to start begging. Until one day, John doesn't say it and falls asleep soon after he's done (usually Sherlock comes first, so it never crossed his mind). Sherlock tries to just bring himself off, John's clearly exhausted. But he can't. No matter how close to the edge he is, he just cannot. It's very frustrating. Eventually, he falls asleep, still hard. When Sherlock wakes up, John's already gone to work, Sherlock's horny as fuck. Sherlock spends the entire day trying to get off and it's frustrated him a lot. By the time John returns, Sherlock's in tears and in a lot of pain.
John asks what's wrong, Sherlock just pleads for John to let him come. And John's all confused because ugh what? And Sherlock begs and to John, he just thinks Sherlock's taken something and he suspects Sherlock is high? Eventually, John tells Sherlock to just do it and Sherlock orgasms violently without being touched. Confused, John asks and Sherlock just says that John never gave him permission and Sherlock is a good boy.
Sherlock's genitals and prostate are sensitive, swollen and sore for days. Bonus for ice pack to groin.
Past brainwashing(?) forced orgasm denial, mental block - Sherlock needs verbal permission to come
(alternatively, that was one of the torture techniques when Sherlock was off in Serbia).
Anyway, John and Sherlock get together, have a normal, healthy, loving relationship. Except Sherlock always asks for permission to come. He finds that he has a mental block and can't actually orgasm without getting verbal permission first. John doesn't realise this, but it's fine because more often than not, John's the one telling Sherlock to "come for me" way before Sherlock needs to start begging. Until one day, John doesn't say it and falls asleep soon after he's done (usually Sherlock comes first, so it never crossed his mind). Sherlock tries to just bring himself off, John's clearly exhausted. But he can't. No matter how close to the edge he is, he just cannot. It's very frustrating. Eventually, he falls asleep, still hard. When Sherlock wakes up, John's already gone to work, Sherlock's horny as fuck. Sherlock spends the entire day trying to get off and it's frustrated him a lot. By the time John returns, Sherlock's in tears and in a lot of pain.
John asks what's wrong, Sherlock just pleads for John to let him come. And John's all confused because ugh what? And Sherlock begs and to John, he just thinks Sherlock's taken something and he suspects Sherlock is high? Eventually, John tells Sherlock to just do it and Sherlock orgasms violently without being touched. Confused, John asks and Sherlock just says that John never gave him permission and Sherlock is a good boy.
Sherlock's genitals and prostate are sensitive, swollen and sore for days. Bonus for ice pack to groin.