How is it possible? It's possible because most women find "jacked" guys repulsive.
Once your build loses an athletic look women lose interest.
Not sure what the definition of 'jacked' is nowadays, but there are two 'jobs' where this doesn't hold true in my experience... bouncing and stripping. (Oh, and try owning a gym or even better running a nightclub...

) Obviously there's a 'psychology of power' at work in these situations, where the muscles may be superfluous to the situation, but they certainly don't act as a barrier/repellent - absolutely not.
Surely to God some of you can back this up??