Two cents from a 39 year old man married for 8 years. [Which may make me more or less credible to you on this subject.]
Lots of people would like to eat this cheeseburger.
Very few people would like to eat this cheeseburger.
Yes, there are muscle groupies to whom, say, Gunther Schlierkamp is the hottest man to walk the face of the earth. [Though even they would find their ardor considerably diminished during the off-season.] But they are few in number and - it must be said - a little unsavory. Their male counterpart would be the guy who wants a skinny woman with huge fake tits - no other qualifications necessary. Even other men have little respect for him. Still, if the only thing holding Alexxx back from manifesting Cutler-like size is fear of not being able to find a girlfriend, he should go for it. He'll still be able to find one.
That said, if you want to know what kind of physique the majority of women are attracted to, just follow the money. The romance novel industry is a multi-billion dollar enterprise whose executives spare no effort in taking the pulse of their consumers to better tailor their cheap fantasies for them. My sources tell me that the cover model de jour is some guy named John DeSalvo. So here it is: American women's idea of the perfect male physique:
Doubt he could win even a local NPC show.