A good rule of thumb is 13 calories per pound of body weight for a sedentary person of either sex, 16 calories per pound for a moderately active person, and 18 calories per pound for a vigorously active person.
So, one thing, it's a general rule of thumb, don't always apply it because some of you don't like to use the word " I" , but if the question has a " you" , the answer can, and
On the other hand, it is a rule of thumb in biology that females (of any species) are much pickier than males. There are good evolutionary reasons why that is so.