You can't legally gift money above a certain value though without paying taxes on it. The situation depends a lot here, but if it were legal to just gift everybody money without interest nobody would ever have to deal with inheritance taxes.
ref: https://www.nerdwallet.com/article/taxes/gift-tax-rate#:~:te....
Unless you have a net worth way above $10 million dollars you don't need to worry about the gift tax. If you accidentally forgot to report a $30,000 "loan" that turns into a gift to a friend, the IRS isn't going to care. You might have to go back and fix it if they notice but it isn't going to be a problem.
The gift tax exists to prevent extremely rich people from cheating the estate tax. If you've never heard of the gift tax before you don't need to worry about.
Germany allows a few 100k tax free every 10 years depending on the exact relationship.
+ "Usual" Christmas / birthday / marriage gifts etc which can be substantial