I am guessing you know the answer but: culture. There are many, many, who say they think about sex all the time just becuase everyone else talks about having sex all the time. This creates a circle: one says these things becuase that persons thinks the other expects and says the same thing.
Give that behavior some time and we get a culture that expects people to think about sex, then add the "stated" fantasy of switching sexes- gender-bending and ergo- thats why peoples thoughts turn to sex first.
Most that say "she so hot" and "I would Bone her" just try to fit in what they think is "the way it should be". The same goes for "gender-bending" and "playing around" with the femenine parts, just something people say without any real meaning or intention.
Give that behavior some time and we get a culture that expects people to think about sex, then add the "stated" fantasy of switching sexes- gender-bending and ergo- thats why peoples thoughts turn to sex first.
Most that say "she so hot" and "I would Bone her" just try to fit in what they think is "the way it should be". The same goes for "gender-bending" and "playing around" with the femenine parts, just something people say without any real meaning or intention.