Sub here, and not bisexual. Will I play with another woman? Sure. I like kissing women, they are soft and pretty and smell nice so why not? And when you put two soft and pretty attractive things together it's no wonder the boys/men/Doms are aroused.
I know there are hetero girls out there that play the same way I do and claim to be bi because it makes them seem a little more adventurous and a little more on the edge and they think it makes the men perk up thier ears, but can you really be considered seriously bi or lesbian when you're doing it to attract a man??