^^ Yeah there's definitely a connection. Depressants such as alcohol and benzos reduce our inhibitions, i.e. they switch off that little voice in your head that says "This is not a good idea" or "Don't do this". We're much more likely to follow through with our thoughts/plans when we're drunk or high. That, plus they reduce our ability to feel pain, so you're much more likely to cut deeper or more frequently when you're drunk or high.
Which is why it is so dangerous
Which is why it is so dangerous


