I agree totally with both of the above. Drugs do speak to the inferior skills of the top and are additionally a crutch for the sub... alcohol as well. There is a reason that no acchol is available at many of the venues that host such play parties. As for drugs, you have to hope that the dom is not on some sort of trip. Many years ago I ended up being badly worked over by a guy about whom in retrospect I realized might have been high on something. I was a bit green back then and did not realize it. Now I would not put myself in such a situation. In addition to drugs I don’t even like it when a sub uses something thought of as being safe such as so called poppers... you never know what the fu@k is in those things and what the results might be.
When both guys are totally in control of their senses and approach things with mutual respect the results can be quite gratifying. Yes respect along with ...safe... sane... and... consensual are the keys to success.