Why?
The trophy set should make it possible to get the platinum / full achievements playing all straight or all gay as well as playing both. If "fantasy fulfillment" is their motivation then it goes against that for the game at launch to force hetero or homo romance on people who just want to play it one way.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix