Well it's certainly not one sided as there's no way to interpret sexual orientation in a chart with much accuracy. I suppose one can surmise from some subtle aspects or position of certain planets but it's not really easy to tell anyway.
I'll give 3 examples of gay friends:
1. Libra Pluto rising, Cap Moon, Pisces Sun, Aries Venus-Mars, Sagittarius Jupiter, Scorpio Saturn. Masculine looking and acting.
2. Cancer rising, Libra Moon, Virgo Sun, Leo Venus, Scorpio Mars, Virgo Jupiter and Saturn. Very feminine looking and acting.
3. Sagittarius rising, Cancer Moon, Libra Sun, Scorpio Venus and Saturn, Cap Mars and Jupiter. Masculine looking and acting.
Let's look at Harvey Milk's chart.
http://www.astrotheme.com/astrology/Harvey_Milk
Just from looking at his chart, I would assume most people would surmise him to be into having a lot short term love affairs- with women.
The main issue with asserting that those with Air heavy charts to be most likely homosexual, well, that's total nonsense. And hell no, being born with Libra Saturn doesn't make anyone gay.
People born roughly from Nov 1980 to Nov 1981 will all have Jupiter-Saturn conjunction in Libra and Libra Pluto. Anyone born during that time that has an Air moon will make them mostly Air. Anyone born during that time that has Air Sun (like me) will most likely have Air Mercury and Air Venus as well. Those born roughly from Dec 1981 to August 1982 will have Libra Mars, Saturn, and Pluto. Throw in an Air moon and or Air Sun- Hahahahaha that's pretty much going to be accusing those born in 1981-1982 to all be gay (that's a LOT of people) which is totally wrong. A lot of my high school classmates are NOT gay and have in fact, been married (some several times already), and I have been married, to opposite sex spouses. And I'm not talking about lavender marriages, either.
So much for Air = gay.