Once I reached my goal weight last month, of course I splurged and binged.
I knew I would.
I had DQ Blizzard, burger, and fries. Then we went to Houston to visit my son and his family, and I thoroughly enjoyed all the carbs we ate while we were there.
By the time we returned, I had gained 7 lbs. No problem, though. I've gone back on a very low-carb diet, dropped three of those 7 lbs already, and will be back at my goal again soon enough.
I gather yo-yo weight losses are generally not likely to be very healthy, but these variations are small. And I don't think I'd bother going on the low-carb diet if I couldn't enjoy these binges now and then.