Let's say things between you and a prospective date don't pan out; they reject you (obviously this thread is directed towards guys because women don't ask for dates; they just get them without trying).
You prove yourself to be fascinating, nice and a good flirt, voila! Relationship strikes up.
Would you not be insulted even though you ended up in a relationship because they don't think you're physically attractive? Obviously, you had to act in a way that overcome apparent physical defects. Is that not insulting?
Like, they didn't want to date you at first because you're not attractive but then they "decided" to give you a "chance." Doesn't that insinuate being desperate enough to go out with an ugly guy?
The relationship seems like a backhanded compliment and established on false premises.