Well not exactly a boffin but I am led to believe that it is due to men having a faster metabolism than women. Men, with different muscle mass, burn through fat reserves more quickly, using more energy for activity and storing less fat. Coupled with higher amounts of testosterone, which helps to burn more calories and creates a quicker metabolism. Women are predisposed to store energy for certain activities, pregnancy, breast feeding etc and burn less fat.
So, it looks like we men pass our intake more quickly and hence there is more ' gas ' to come out, more quickly. I know that I ' dump ' far more regularly than any woman I have ever known. Used to work with one, who was lucky to go once every 4-5 days. The women can let theirs out much more slowly, quietly and a damn site less smelly.
That reminds me years ago I took a girl out to a cafe for a bite and as we were just getting seated I asked if I could push her stool in. I remember her replying that we should see how lunch went first.