TBH this is an addictive hobby and I suspect spending on wine strains quite a few relationships.
FWIW my way of keeping the waters smooth, is to make sure that a good proportion of purchases are what my partner enjoys. Nebbiolo and Moscato are easy sells (and no hardship). Pomerol is not something I’d necessarily buy for myself, but enjoy it enough for there to be no issue. Sangiovese and Riesling are perhaps the reverse. Shiraz used to be a shared love, but that’s lessened over the years. Really old wines often get a critical look, but anything with a little barnyard gets the thumbs up from both of us.
Sauvignon Blanc is banned. I don’t mind it, but my partner is from NZ and suffered it for years. Ditto but more so for Muller Thurgau, though I pulled a sneaky trick by serving some Feldmarschall up blind when we had friends over. It was good.
So maybe it may help (as others suggested above with Riesling) to ensure your partner gets you to ensure a good supply of what they like, without them having to worry about building up the knowledge to choose them.
Separate credit cards and checking accounts to purchase things without the other person questioning it. Whether it is golf clubs or purses or wine or dresses, I think adults deserve to make their own choices with non-essential funds. Figure out what it takes to run the house/life financially, contribute to a mutual account for this, and get out of each other’s faces on the rest. If one partner is not currently working outside the home, get an account for him/her with direct deposit on a scheduled basis.
What works for me is moving around my cases in my offsite locker. After having a fun time seeing but exhausting time moving my wine, my urge is dead for at least 3 days.
I get a version of that lecture every shipping season. Thankfully it does not impact our important savings priorities, so not a huge deal. The only cardinal rules are that it cannot ever affect retirement savings, our emergency funds, vacation plans or cause us to have a credit card balance.
No lectures here. We keep our finances separate only combining for joint living expenses and our children’s needs. If I suggested that we mortgage our home to buy wine my wife would likely question my sanity. If I insisted on continuing that discussion there would certainly be expletives and derogatory remarks directed at my mental capacity or lack thereof. It would go over like a turd in the punch bowl.
I completely agree with Merrill. We’ve had separate accounts for over 20 years. We probably both make purchases that the other would question, but we never have that conversation, which doesn’t really appeal to either of us. Besides, we both like wine.