Celebrity trainer Jono Castano sends fans wild as they notice a VERY naughty detail in his shirtless Bali photo – so did you spot it?

Jono Castano has sent his fans into a frenzy when he donned a very tight pair of speedos while on holiday in Bali.

The celebrity personal trainer, 32, turned heads after taking a dip in his villa’s pool and left little to the imagination.

The muscular personal trainer was inundated with snappy comments from fans, who certainly made their feelings known.

“It looks like a sock in that swimsuit,” one fan cheekily wrote.

“Looks heavy,” another added, while another added: “Jesus how much does that thing weigh?”

Celebrity PT Jono Castano, 32, has sent fans wild after they noticed a very naughty detail in his shirtless Bali photo while dressed in a pair of speedos. Pictured

Another follower joked that he was “subtle” in the photo.

Someone else said: ‘Ummmm ooooop’, with an eggplant emoji.

Other photos showed Jono enjoying his Balinese holiday, including soaking up the sun and working out at the gym.

Jono and his pregnant model girlfriend Simone Holtznagel appear to be having a babymoon ahead of the birth of their first child.

Celebrity trainer Jono Castano sends fans wild as they notice

1700464061 975 Celebrity trainer Jono Castano sends fans wild as they notice

1700464062 711 Celebrity trainer Jono Castano sends fans wild as they notice

1700464064 836 Celebrity trainer Jono Castano sends fans wild as they notice

Some of Jono's followers gave him a playful rib after he left little to the imagination in the swimwear photo, with one writing: 'subtle'

Some of Jono’s followers gave him a playful rib after he left little to the imagination in the swimwear photo, with one writing: ‘subtle’

In October, Simone announced the happy news that she and Jono are expecting a baby together.

The model revealed in an Instagram post that the couple will have a baby girl in March 2024 and later admitted that they had already decided on a name.

The stunner, who went public with her relationship with the celebrity trainer in 2022, told Who magazine she was overjoyed with the news.

‘Children have always been in our plan. We started talking about it more and more and then it just happened,” she told the publication.

Jono is currently with girlfriend Simone Holtznagel, as the couple enjoys a babymoon before welcoming their first child together.  Pictured

Jono is currently with girlfriend Simone Holtznagel, as the couple enjoys a babymoon before welcoming their first child together. Pictured

In October, Simone announced the happy news that she and Jono are expecting their first child.  The couple is expecting a daughter next March.  Both shown

In October, Simone announced the happy news that she and Jono are expecting their first child. The couple is expecting a daughter next March. Both shown

Simone told the magazine she discovered she was pregnant after feeling unusually ill following a holiday in the Maldives to celebrate her 30th birthday.

She decided to take a pregnancy test ‘on a whim’ and it turned out to be morning sickness.

‘The first few weeks were a bit difficult, but not as bad as some people have. We are very grateful,” she added.

The blonde beauty added that the famous couple is already preparing for the arrival of their little bundle of joy.

‘We have two names that we both love very much. “I bought two pieces of clothing and my mother and Jono’s mother bought me some small gifts,” she added.

Jono debuted his romance with new girlfriend Simone in May last year.