Boys grow into gallant young men.
A cold cold person is so cold that they're super cool. They're sooo cool and gallant and manly. Touch a manly person and feel how cold their skin is. It's like that all the way down to their heart.
Usually when you see 々 it means that the reading is two on'yomi readings repeating. Well this is a bit of an exception. Saying りんりん is kinda hard so just drop the んs and you'll have the reading りり!