Male
Manly, Brave
The narwhal is meeting in private with the turkey so they can, uh, show each other some private things. Doing this they realize they're both male! You gotta be pretty manly and brave to do something like that.
ゆう
おす, お
None
These male animals are obviously experimenting with things still. Ah, they must be youths (ゆう)! To be a youth, again!