I’m almost at maintenance now so not bothering with MFP so much but when I was losing weight I used to have a day or two each week where I’d go slightly over (it would look like a spike on on the MFP graphs); this had the advantage that it stopped me going mad and also seemed to stop my body getting too ‘used’ to a lower calorie diet (I was well under most of the time) and adjusting my metabolism accordingly, because I never really plateaued much (and as I had relatively little to lose, I was probably more likely to plateau than some). You do have to make sure you’re under the majority of the time, obv.
Having said that, I did have an almighty hormonal sugar binge at the weekend. We had just done 7 miles of walking Cam to Allypally, to look at the views, so I hope it didn’t do too much damage. I sometimes think I have as much of a problem with sugar as some people have with alcohol…