Just my thoughts and opinions. Although it may be fun for her and others around her, it is NOT appropriate behavior for ANYONE, male or female, on the bus, to do so as it may distract the bus driver, and cause an accident. With any bubbles, there is ALWAYS someone with a ready finger to poke it and burst it, more often than not creating a mess. The gum may go only on the bubble maker, but usually goes onto fingers and onto the bus seat in front of the one blowing bubbles as well, necessitating someone to clean the gum off of the seat. I thought ALL buses had rules against Chewing Gum on the bus, because of this and other reasons, like it accidentally drops out of mouths onto the floor, is left there for someone to step into and track across the entire bus floor, as well as the not so funny kid/kids who sticks his/her wad of gum under the seat (for posterity?), and the fact that it may be a possible choking hazard for the gum chewer, and a health hazard, with saliva all over it, to one who has to pick it up or clean it up.