Personally, I'm convinced that the look had something to do with it. This is my reasoning:
~Sven did not just have "bad aim." He has wanted Faye for a long time and he grabbed his chance to do a little wooing when he saw it.
~Faye has been attracted to Sven essentially from when they met, though she didn't admit it or like it.
~Ergo, when he gave her the Come Hither look, she reacted strongly, as we saw from her blushing.
~So she blushed, and she was even more attracted to him because of the look--and that intense feeling forced her to admit that she really liked Sven.
~Once she had admitted that she liked him, she decided it was time to go after him and stop letting her "issues" get in the way of her life, for once; his "maybe you just need to, like, do it" simply provided the perfect opportunity (and she knew he liked her--or at least she was reasonably confident he wouldn't reject the sex).