Most single people who have profiles on dating websites are looking for sex, at least eventually. It would be unusual to find someone that truly isnt hoping to get into a relationship that eventually leads to sex.
The problem is that sometimes people want to put the cart before the horse and the subject of sex comes up far too early.
Men, when corresponding with a woman on a dating website, especially at the very beginning of the process, dont ask her about sex or what shes into sexually or how many times a day she likes to fuck or if she likes to give blow jobs. In most cases, the lady will find that to be an instant turn off.
Women want to know that guys are interested in them for more than just sexual interaction. Even on websites that are geared toward people who are into BDSM and fetish, the ladies still want to have some vanilla conversation before they are asked to spill their deepest, darkest fantasies.
It comes across as though the man is only interested in sex, and that will turn a lot of ladies off even if they are only interested in sex. It seems disrespectful, and most women do want to be treated with respect and treated like a lady until the time becomes appropriate to treat her otherwise.
Of course, internet dating can be complicated, and it can be rather confusing for the guys because some women respond really favorably to instant sex conversation. They expect to be asked questions right away, especially if they are on BDSM or fetish free porn sites. So how does a guy know what to do? Sometimes its possible to tell by reading the persons profile carefully and really paying attention to what it says. That will often show quite clearly what type of woman she is and what her expectations are. A man can simply do whatever he wants, figuring that the right woman will understand him and it wont matter. Another option is to wait discuss vanilla topics and get to know her as a person, and let the lady introduce the subject of sex whenever shes ready. That will make her feel respected and well-treated and most women will really appreciate that.