They can have contact covers no problem, it's just not in the plug standard. Every couple with kids I know installed socket safety protectors[0] in their power

They can have contact covers no problem, it's just not in the plug standard. Every couple with kids I know installed socket safety protectors[0] in their power outlets if they wheren't int there already. Some built in ones just require to push the plug in a bit harder, but for even better safety turning ones as in the amazon link are available. [0] https://www.amazon.de/dp/B00CNRFU2Q https://www.amazon.de/dp/B00CNRFU2Q