Ugly but still erect?

weird question maybe but guys, could you be erect in the presence of someone that you don't find really attractive simply by being stimulated?
I have steamy makeouts with this guy and he gets hard and I sometimes give him a BJ.
But I don't know why, this guy never says any compliments to me (excpt like "this feels good" or "you are really sweet") and I am having a hard time trusting he finds me attractive or beautiful.
I think I am just a girl that gives him sex and that I am ugly in his eyes...
Ugly but still erect?
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