Questions for you guys who tried cocaine

[GengisKum]

Could someone please explain me what are the real effects of cocaine?
I tried it several times and it pretty much did nothing to me.
Effects: unable to sleep for several hours, mouth/theets numb, and urge to do another line. Is that all?
The last effect makes no sense, unless I'm subconsiously liking it. But I have no conscious mental effect, what kind of drug is this?? I don't feel more chatty than usual and my brain works like when I'm not high.
Before you ask, I tried from several sources, so I don't think I always got bad coke.
As for quantity, once I did like 0,4g in half an hour that should be an enormous amount, but still I felt pretty much nothing.
Also, I've read Freud's Cocaine which I think said at some point that the drug has no effects if you're not very tired. I tried when I hadn't sleep for a night, but the non-effects were the same.
Another guy who tried it thinks pretty much the same things, so I'm not the only one.

My friends, on the other hand, do like it a lot. They keep on telling me "you don't get it, you're high and you don't realize it" but they were never able to explain me what the real effects of the drug are.

Unable to find an answer I started thinking they do this because they feel gangsta or something. Their typical coke night is: going to a dude's place, and pass the night doing lines. When it's finished they go downtown to a [censored] to buy some other. Is this the right way to do coke?
Shouldn't they go the bar/discos to find ladies? isn't cocaine used for that?

Last question: when should I consider them being addicted? At the present time they're doing it from one to three times a week. Is that much?