How long should I abstain from drugs/alcohol before trying to conceive (for a male)?

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I occassionally use drugs like marijuana or spice, and drink from time to time. My wife and I are talking about trying for a baby in the semi-near future. I don’t want to endanger the baby by being irresponsible. How long should I be totally clean before trying to conceive?

the rest of your life from now on be a parent not a butt head any a * * ho** can tell you that ooo and bye the way diapers are pricey so you cant bye that beer for now forget the joints
You said yourself that you don’t want to be irresponsible, so how about quitting drugs altogether so you give your wife and child the best possible future?