Sex expert names the biggest bedroom red flag people ignore and it’s surprisingly common

When it comes to relationship red flags, most of us can spot the obvious ones from a mile off.

Poor communication, lack of trust and constant arguments tend to come to mind, but according to one sex expert, there's a surprisingly common bedroom behaviour that could be causing problems long before couples even realise it.

Speaking exclusively to Tyla, sexologist and relationship expert Dr Tara Suwinyattichaiporn, author of How Do You Like It?: A Guide for Getting What You Want (in Bed), revealed the biggest bedroom red flag she sees time and time again.

And no, it's not a lack of chemistry.

It's actually a lack of foreplay.

Sexpert Dr Tara Suwinyattichaiporn has opened up about her biggest bedroom red flag (Supplied)

When asked what the biggest bedroom red flag people ignore is, Dr Tara responded without hesitation: "Not having enough foreplay."

While it might sound obvious, she explained that many people are still placing far too much emphasis on penetration alone, despite the fact that it isn't what brings most women pleasure.

In fact, she later revealed one of the biggest myths men still believe about what women want in bed is 'just pounding penetration'.

"They don't know how to move their hips; they just pound," she added.

One of the biggest myths men still believe about what women want in bed is 'just pounding penetration' (Getty Stock Images)

Dr Tara believes this super narrow view of sex is partly driven by pornography and unrealistic depictions of intimacy in films and TV.

"If you see a movie scene where they're literally just kissing and then he lifts her skirt up and penetrates her, I'm not thinking sexy, I'm thinking, 'Ouch'," she said.

"She's probably dry as f*ck."

The sexologist went on to explain that many people skip over the emotional and physical build-up that makes intimacy enjoyable in the first place.

"We need to be humanising sex again," she said. "Sex isn't just an act. There's a whole thing around it."

The expert also revealed another major warning sign she believes couples frequently overlook.

Never skip the foreplay, folks! (Getty Stock Images)

When asked what behaviour often predicts a relationship won't last, she pointed to one thing: a total lack of sexual communication.

For Dr Tara, the healthiest relationships aren't necessarily the ones having the most sex - they're the ones where both partners feel comfortable talking about it.

And as for the one bedroom habit that's quietly ruining relationships?

"Using their phones a lot in bed," she explained. "There are people who will have sex and then immediately pick up their phone and scroll on social media rather than talking or cuddling.

"I think that kills sexual connection."

So while grand romantic gestures are nice, Dr Tara suggests that the real key to a healthy sex life is much less glamorous: slow down, communicate more and never skip the foreplay.