Sexual energy, appreciation and respect. A man needs to be aware of all of these factors when dealing with women and people in general. It's not to say that women can't be great comrades and boost your life in other ways other than sex, but you must be aware of how that interaction is COSTING you. But it is TRUE. A man who gets all of his female attention from 10 close female "friends" whom he bathes in NON SEXUAL attention from all 10, he will not be sexually attractive to anyone, since his friends fed him a diet of non sexual energy.
The positive side of this is if your 10 friends all find you sexually attractive, your sexual masculine swagger will be amplified, and in the presence of other women many will strangely find themselves also sexually attracted to you.