I'm not saying I would try to do it for fun or anything, but it it something that happens - even to girls...
I think its a bit chauvenistic to think that a girl can go through her life without burping or farting, when guys just let them go whenever they feel the urge, whereever. You try not to for a couple of days, and see how you feel....... ;)
Great works are performed, not by strength, but by perseverance.