women and..women?

im a some what straight female, i have a boyfriend too. But i was just wondering if there are any other women that get turned on and think of women? ive been with my boyfriend for over a year. i have three kids and pregnant, needless to say i have craving for sex. now, my boyfriend is AMAZING at what he does no matter where or how he does them.. he perfects it... am i the only one that even though i have a man to do me right, wants something different anyway? and how the hell do i make them stop?