To be fair
This is not a trap.
Take this from a trap I know what to look for and how to isolate facial features which are dead giveaways.
In all honesty she looks like my cousin excepting my cousins hair is naturally blonde.
Starting from the neckline you can see the smooth chin transition into the cheeks and the gullet itself which thus shows that the facial features are too "soft" to be a mans structure (The mans face lacks alot of the structure and has a differant ridgeline along the lower cheeks and into the chin.
running along the neck line, the light would, in the case of the picture, show contrast if there was an adams apple.
due to the absence of one, you could easily note that at this point it becomes slightly harder to tell.
Along the base of the neck is a little indentation then a transition to the collarbones. this is well defined but not as sharp as a mans.
Moving along, the curves of the waist into the hips along with the outward belly button (Most women end up outies after a while due to pregnancy I am told) then the transition to the hips (In this light you can tell the thighs and hips are much wider than the chest)
Then finally the old knees. the knees are always the dead giveaway.
Oddly enough though, I have no idea what it is about the knees that makes the trap obvious but...well there it is.