firstly, you asked that question as if you were about to give us a lecture.
secondly, i like you choice of the word "most" but i think it will be interesting to know why
any man would consider any relationship "parasitic".
"he" asked her out, he was aware of what he was getting into or he should atleast be knowlegeable of her ways
besides! he got himself into it!! so if its no longer comfortable...he should kiss the door!!! or enjoy his parasitic love
it can actually be fun you know!
peace!!