Not a single female member on the shaadi website is looking for casual sex or a one night stand. They are either looking for a husband, or a long term relationship (long term = forever).
If you reveal that you are looking for casual sex or a one night stand you will be instantly ignored by the girl or blocked, no matter how good looking you may be (the only women who will continue giving you attention will be either female escorts or Nigerian phishing scammers).
So how do you get casual sex without mentioning it? What should be your strategy?
Your strategy should be to make her feel, “Even if he will not marry me, no problem, let me f**k him on the side, while I continue my search for a husband.”
And the only way to make a woman feel like f**king you is by making her feel attraction.
So your strategy should be to make her feel attraction.
Bonus tip: Women know that men who are eager to marry, are usually lousy lovers who can’t get laid, and the reason these men want to marry is so that they can finally get laid. Women know that. They also know that once they marry these men, they have to settle down to a lifetime of lousy sex, and before that happens, they really want to enjoy some good sex.