It's only gay if you want it to be 
i love the way he worded it............"I am CONVINCED that Paco's...."
when you say "i am convinced" about something, it means you have really put effort into thinking about it
that means he has really been spending alot of time and energy analyzing the topic of khan's and paco's arm size, and after exhaustive debate..........he has arrived at a conclusion
kyomu is not your marginal schmoe.......he takes his muscle worship VERY seriously