In general, it will be more correct to blot the head after emitting with a piece of toilet paper, and to engage in intimate hygiene once a day (in the morning). By itself, urine is not so dangerous, it is normally sourish (pH from 5 to 7), so it will not do much harm to the delicate skin of the head (even if you have a circumcised one). The greatest harm is caused by bacteria, which grow rapidly under the influence of urine, because the latter contains substances that can serve as food for microorganisms. Inattention with respect to TAM hygiene can lead to inflammation of the head due to the accumulation of smegma and a large number of bacteria, for which this smegma is paradise
Of course not true. What can remain on the penis after urination? That's right, urine. Urine (which almost entirely consists of water) will not harm the skin, especially in the amount of a couple of drops.
You should not forget about hygiene (after all, we do not live in the 9th century), but you should not overdo it either .