He takes a deep breath and exhales from the bottom of his lungs with a "hmm". The smell is sucked into the other person's nostrils without mixing with any impurities. After being exposed to it many times, he becomes addicted to the fishy smell and begins to wish for the other person to press their tongue directly against him. He presses his tongue against his nose and sucks with such pressure that it deforms. It's a vacuum nose blow job that leaves him covered in saliva. He licks all over with hard thrusts, making slurping noises.