Check your local NA meetings people, it helps. Don't compare substances, everything can be harmful. I'd argue that culture around these 2 can be really toxic, glorifying use without acknowledging risks.

There's no scientific proof it works.

I could've sworn that there was research about over being the more higenic way. I argued with my brother over this. When I looked online the only research I found was about people who use the over way are more vocal about it

yep