Puppy Keeps Licking other dogs Wee

after walks, my puppy will go to my big dog and lick the pee off of his “part”. obviously, I stopped this behavior immediately because that’s weird and gross, but he doesn’t constantly and won’t stop even after being corrected. He’ll just walk away and go back to trying to lick the pee off of him

added information , my puppy has been humping my older dog since he was 7weeks old