Realistically I know doing physical methods is the most effective and achievable thing to do. I use the most physical contraceptive I have available and try to be a little cautious.
Why would magic face a limit at me nutting in someone though? People can and have killed, changed their fate, gotten incredible luck, etc. all from magic. Some people who never even do any occult work have extraordinary ability just from their meditation and spirituality. If there was not a commonly known ritual about this, couldn’t one theoretically ask for one from an entity? All the other rituals had to come from somewhere.
I do think you could protect yourself from a bullet with an energy shield. Stuff like guns jamming, people surviving wounds that 100% should be fatal, shit, maybe even a legit armor of your pure energy like Goku. I think fate is the greatest magician, and every person is doing magical things every day whether they like it or not. Not saying I have these powers myself or I am anything special, just that some people have already done even greater things.
Anyways, just in a more general question: What do you guys do in situations like this, where you want magic for a specific and niche thing? Do you ask for help from spirits/entities? How do you know that you are being provided a spell for what the spirit claims it is?