The idea of masculinization was one of the things that I was interested in here too. I'm guessing it's a rough gay counterpart to the desire/fetish some straight men have for feminization (not to suggest that only straight men do that).
The sports suggestions in the total jock files don't bother me nearly as much as the low intelligence suggestions. The latter does enhance the fetish value for me, but the cost's too great since intelligence is something I value more than anything that's merely arousing.
It's good for the people who want it to have such files, but I wish the low IQ stuff were more decoupled from the masculinity stuff.