Isn't very compelling. Nor is there much potential for comedy. Sounds more like a short joke, with a pretty unfunny punchline, that would take place in a bar and not take more than 5 minutes. It's not the basis for an entire movie.
At least not an entertaining one.
Most gay guys (of the non-totally-flaming type) could get more girls' digits than a straight guy...unless the straight guy were Brad Pitt, Matthew McConaughey, or Colin Farrel.
This is pretty much common knowledge.
However, it might actually be interesting to turn it around and make the straight guy a total homophone and have him feel that his masculinity has somehow been insulted by the gay guy...or maybe the gay guy has a really hot friend whom the straight guy wants to be hooked up with....and then have the straight guy bet the gay guy that he (straight guy) can get more dudes' numbers than the gay guy can (over the span of, say, a month). If he wins, he gets hooked up with the girl...or whatever.
The comedy, then, would come from the homophobic straight guy having to learn to overcome his "fears of queers" and relate to gays better.
Within this journey lies his lesson...to become more sensitive/compassionate. By learning to relate more to gay men, he, in turn, learns how to better relate to women (and people in general).
At the end, he wins the girl...but...as a twist, you should make the girl turn out to be a tranny.
Actually, this sounds like a decent idea now that I've played with it.
I'm going to write the script now and send it to IWrite by next week.
Thanks....SUCKER!!!!
(I'm only joking, of course....sort of).