So I guess this question can seem rather disturbing and make me look like I'm not very stable mentally, but let me explain.
All of us live practically equally, our lifes centered in a job or a career that can provide more or less pleasure to a person, doing all our duties, like cleaning or cooking, and spending our free time doing what we prefer. At least, that's the basics for the majority of us.
But the thing is, the pleasure that we get doing these things are provided by different reasons, it can be for distorted visions of the reality for example, like being a workaholic, where in essence working doesn't give you any pleasure, but you get it anyway because of the value that you've put on it. Anyway, the pleasure that you get from it can be provided by a much simler and primitive way, like heroine or stimulating your stupid genitals.
Assuming that you can perform this activities (drugs and other physical stimuli) without them affecting in your daily life in any way, (what I said about your job and doing your duties) why shouldn't we just drug ourselves up if, by doing this we'll get a total income of pleasure that we couldn't get otherwise?
This basically comes from the fact that I've heard from a lot of people who clearly have thought about it (my philosophy teacher for example) that we shouldn't settle with just pleasuring ourselves with our carnal desires, that we should aim for big things, and not just sheer pleasure. I would like, related to my question, how this is "true" (to put it in some way).
Just to clarify, if anyone cares, no I don't drug myself up, or let myself in a world of lust, I'm just asking why it's always said that one shouldn't do this.