That can definitely happen when you're focussed on something else than what you're drinking (or eating!). It's gonna be even more pronounced if you're drinking, distracted and not particularly experienced with alcohol. If you enjoy what you're drinking you just need to be conscious of when you refill and you'll be fine. If you don't and you're just doing it as a sort of health thing, maybe you made the right choice. As someone who enjoys whisk[e]y, rum, gin, wine and beer, I think it's incredibly enjoyable if you're able to keep on top of it and I feel a little bit sad that there are some who won't enjoy things like making cocktails or tasting wine due to abstinence. I don't want at-risk people to descend into alcoholism against their will, mind.