It DID seem more like a question than anything and that make Anakin blink a little. He was far more used to the other tones, at least in part, though Obi-Wan's way of bringing things up had never exactly been more than a tad exasperated SEEMING.
That part of things did give him cause.
"Not quite my type in the end." he decided it was okay to go with. Mentioning the alternative would be...odd to a lot of beings. Not all, but, still .