Question: Is it wrong to call a safe word in a punishment I wanted in the first place?
Answer: It depends on a lot of factors. First, are we talking about Punishment for a mistake or Funishment for playtime? These two terms get confused a lot, and they can have different interpretations. Once that’s clarified, using a safeword is often a given, but that’s not always the case.
No matter who asked for playtime, a safeword is a lifeline to alert your partner to any issues, including that you’ve reached a limit. Just because you asked for that spanking doesn’t mean you can go all out. Sometimes the circumstances aren’t perfect, and you ask to stop long before you want to. It’s not wrong to need to end things before you want to, and you should never push yourself just to try and satisfy your partner.
If this is a requested Punishment for bad behavior or correction, then negotiate what a safe word means before the Punishment begins.
Some dynamics do not allow a safeword during Punishment unless there is a medical or emergency need. That is because the dynamic negotiated that stipulation and also how Punishment would work. The parties involved agreed to those terms. In this situation, calling your safeword during punishment may just get ignored because your previous negotiation removed that safety net.
Whatever the case may be, talk to your partner beforehand to clarify the stance for a safeword.