I was very abused as a kid, I was slapped around, so getting slapped is a trigger for me. You never know if she has the same issue. However, I’ve told my partners upfront that I can’t be slapped. Communication is key! I’m sorry you both had to deal with that

My wife loves being spanked during sex but she cries about half the time. It’s pretty normal to cry during a spanking or other pain based sexual activities. Anyways OP you need to get consent from your girlfriend and see if she’s ok with trying the new thing before you surprise her with it, especially when pain is potentially involved.

If you are going to lead her into that dark garden, best you do it while looking into her eyes. That way you can gauge her reaction while she takes those tentative first steps. One huge thing about pushing boundaries is that you absolutely have to watch the feedback that her body is giving you. Things like an arching back, fluttering eyelids, heavy breathing and moaning are all signs that whatever you are doing is working. A good way to test whether she has any submissive or masochistic tendencies is to take her hair firmly in hand and gently at first start pulling her head backwards. If she closes her eyes and moans, you are good to go. This is probably about the best way. As for spanking, I would suggest that you first pull her over your lap, put one hand on her shoulder and start rubbing her ass with the other. That should be an obvious sign to her that you want to try some spanking and it gives her time to object if she does not want it. The hand on her shoulder is very important because it dominates her a little and it also tells her that you are there with her, connected to her. At this stage, you might want to lean in close and whisper that Daddy thinks this bad girl needs a spanking. Again, this gives her an opportunity to obect. Yes, yes I know that ideally one should ask first but sometimes our hands are more articulate than our words. If you do this, please also TAKE NOTE that people are not always able to articulate non-consent. You should watch VERY CAREFULLY for any signs that she is not comfortable. Things like pulling away, whimpering and tensing up are sure signs that she is not really into it, so maybe just try one light tap and then check on her.

she was probably 4 years old