Here’s one: since men are larger and headboard than women, we need more food just to stay alive! A few hundred extra calories a day over a lifetime, the cost must be substantial — almost certainly greater than the cost of tampons.
Life is unfair to all of us, both sexes.
You as a man can choose not to east as much as you need. You grow a bit less and need less food. A woman can't choose not to leave the house 5 days per month if she want's to keep a job. Yes, we can keep arguing over this but I though we were done with this already 50 years ago. I'm a bit surpriced to see it to be honest. We talked about this in school when I was 12, 30+ years ago. (Sweden)
Last year one county here started with free menstruation protection for 12-23 year olds [0] (swedish...) Apparently Scotland was first in the world 2017 [1]
[0] https://www.svt.se/nyheter/lokalt/stockholm/gratis-mensskydd...
[1] https://www.independent.co.uk/news/uk/home-news/scotland-fir...
Men also get pressured in other ways, but very rarely are they directly monetary/consumptive the way women are in my opinion.