Dear dsjeya, i disagree.
I think most girls do not want to be in relationship with someone who is already involved with someone else, simply because girls can not stand sharing of their partner. And if they do have interest with someone who is already involved with someone else,(in some cases) it doesn't mean that all girls are alike. One cannot judge all girls by using one example, it's being bias. Further, there could be many reasons, every relationship is different. I have no clue of himamalini's love life, so i will simply stay away from it.
As far as snaching is concerned: well, both guys and girls have unique personalities. Some guys/girls have a little bit of obsession in them~ being a part of their personality --- others don't..if one is refering to a example- where this situation is present, one must recognize this concern and be aware of it.