"It can effect it if they test are done the day after he was out drinking heavily, right?"

Not that I know of especially in 24 hours lovbyts.

Chronic intake of alcohol over longer periods of time can effect Testosterone levels and more importantly E2 levels as the same pathways in the liver that clear out the byproducts of alcohol are the same for E2 metabolism; so they compete.

That's why we see so many "beer bellies"...it's not the beer it's more the increase in E2 levels in chronic drinkers.