Is i bad to allow myself 3 days of overeating for each month?!

definitely not good, over eating is super bad even if its for one day. if you cheat a little its fine but you still have to consider eating a Well Portion meal. don't completely just cut it off, start to eat a little less each month until you think its a reasonable amount. if you feel 3 days a month then keep eating less that last day until you don't over eat. i hope i helped you alot:)

Depends on what you mean by overeating? Eatting too much too can overtime cause you stomach to expand making it harder to feel full with smaller meals. But eatting too many calories or indulging 2 or 3 times a month is reasonable.

I eat healthy 6 days a week then go out to dinner with my wife and not worry about calories.

Really will depend on what your normal diet looks like the remaining 27-28 days of the month.