7 relationship experts reveal the questions you should avoid asking at all costs on a first date

Bringing up past relationships can also ruin first dates, experts say.

Some people might be curious about why their date broke up with an ex in order to spot potential red flags down the road, New York City-based love coach Susan Winter said. This question is problematic for multiple reasons, however — including the fact your date likely won't be honest with you.

Plus, what happened in the past isn't relevant to the date that's happening right now. While someone may have had a rocky relationship with their last partner, you could bring out a completely different side of them.

"Sometimes we are different versions of ourselves with different people," Winter told Business Insider. "There are people who bring out the best in us, and there are people who bring out the worst in us."

Avoid talking explicitly about sex on the first date, says Marla Mattenson, founder and CEO of a relationship consultancy. (The one "correct answer" here is "CEO," if someone actually asks this, Mattenson added).

Sassoon said men especially tend toward getting too sexual too fast. "They can be a little more inappropriate," she said. "It's a little too much, too soon."

Avoid judgmental comments and questions about what someone does, wears, hangs out with, etc., says Andrea Syrtash, a dating expert and co-author of "It's Okay to Sleep With Him on the First Date: And Every Rule of Dating Debunked."

"You don't want your date to feel like you're keeping score and auditioning him or her for the future," Syrtash told Business Insider.

Along with judgmental questions, avoid asking things that would make your date feel guilty about a personal story they revealed to you, says relationship coach Sami Wunder.

"Remember, the point is to feel good," Wunder said.

These kinds of comments can suggest a negative attitude that will lead to problems down the line.

"You can tell when people have a negative attitude if they are judgmental or making fun of the people around them, if they are curt with the waitstaff, or if they're complaining," Winter said. "[You] just don't need that negativity."

Mattenson says to avoid asking a question about someone's appearance.

In fact, don't say anything about your date's appearance unless it's a direct compliment, Miami-based matchmaker Claudia Duran told Business Insider. Even if your date looks different in real life than they do in their photos, or if you don't want to see them again, Duran says to still be kind.

"If there's nothing nice to say, be respectful and don't say anything at all," she added.

Don't inquire about a long-term relationship on the first date, Duran says. While you should be upfront about whether you just want to hook up or would like something more serious, getting too serious too soon turns your date off.

Even if you are looking for someone to get serious with, "no one likes to be asked on the first date," she said. "It's too early to say."

Plus, you yourself should not decide whether you or not you want to date a person after just one date. Just as if you were a job candidate looking for a new gig, you don't know if the first place you interview at will work out.

"You go and you look and you talk to the people and you look at the corporate culture and you kind of get a feel for whether this job would be right for you," Duran said.