For example, Andorforte, from AUS, is applied to the scrotum, easy, just takes a couple of minute to dry, then you can get dressed. Not great for those of us that like to go commando, though
For men with low DHT production due to prior exposure to Propecia or Proscar (finasteride), testosterone creams (non alcohol based) applied to the scrotum may be a good option. This application site tends to produce for DHT since that tissue is rich in 5 alpha reductase enzyme receptors.
Should You Apply Testosterone Gel or Cream on Your Testicles for Best Absorption?