Extremely low libido and "whiskey penis" after any stimulant, smoked substance, or alcohol?

Hey guys,

So lately I've noticed that any time I take a stimulant like coffee or energy drinks, my libido, sex drive, and ease of "turning on" when in the presence of beautiful woman goes down. And I'm talking like no physical attraction and viewing can get me a hard on.

I don't really think about doing anything physical with a girl anymore either because I'm usually more focused on the conversation. Is this just typical Depression or what?

And like I mentioned it's mainly when I'm on stimulants, smoked something or been drinking.

Do these things just lose interest over time if I have low testosterone or what could be the culprit?

Thanks all