for those wondering about why ehsaan likes katha -- he doesn't. viaan clearly sees it as a pattern. basically it is about the chase and acquisition. whatever is expensive or beyond his reach, ehsaan has to 'love' that. then once he got the girl, he is bored. then on to another. so katha has clearly a 'touch-me-not' tattoed on her head. something that clearly shows that she is not the type of flirty type girl who will accept any chik chik uncle. that is also what attracted viaan as well in some sense -- that she isn't like those gold diggers. in ehsaan's case, it is about the chase and not about getting to know her at all. thats why he has no true interest in aarav or really empathizes with her problems. instead, it is almost like a strategy.
1. be over friendly and play innocent
2. make lots of jokes
3. be touchy touchy / spend lots of time
4. get her to open up (so she will become dependant on you)
5. impress her with your bank account.