Every time I open a bottle of liquor, it tastes best the first

I honestly desu imo think my drinks get better the later I drink it after opening. I had a Woodford reserve double oak that got way better a week after opening.

I think mainly it's placebo.

>>8268221
>>8268253
There are volatiles (both good and bad) that will evaporate and escape every time you open the bottle, so the flavor profile of spirits will change over time. Some spirits benefit from this, some do not. I prefer to finish any premium spirits I open within no more than 2-3 weeks (bottom shelf stuff I'm a bit more flexible over).

Additionally, there will be oxidisation every time the cork/cap is taken off and new oxygen gets into the bottle. This also affects the flavor.

On a side note I watched a TV show last night in which a repulsive Russian Jew in London paid £5,000 for the last nip of cognac from an 1811 bottling. I'm prepared to bet it wasn't as lively and delicious as when the bottle was first cracked decades ago.

>>8268221
I've only seen the opposite. Cheap/mid tier brandies are undrinkable the first day, you gotta open them and introduce some air first