While I don't think huffing cats would be good for your trachea or lungs (honestly the biggest danger is probably the cat scratching your face/eyes), it is nowhere near as bad health-wise as biking without a helmet.
It seems all three of them were into pussy. This video should be playing in the background on this manga episode. https://www.youtube.com/watch?v=nJ0UfziNTBE
IS ONE JAPANESE BROAD NOT ENOUGH FOR CHADANO? CAN NOTHING STOP THIS ABSOLUTE MADMAN? WILL HE ALONE REPOPULATE JAPAN?!?! FIND OUT IN THE NEXT ISSUE, TRUE BELIEVERS!