Two men were caught having sex with a woman on a football field.

Shocked dog walkers alerted police after seeing the threesome cavorting together.

Adrian Parsons started kissing his girlfriend during a drinking session on the beach at Goring Gap, near Worthing.

They were both joined by Kevin Gilmartin who asked if he could join in.

The three left the beach and walked through woods to a sports field at Goring Hall Hospital.

Horrified witnesses saw Parsons having sex with his girlfriend who was naked from the waist down before Gilmartin joined in, Worthing Magistrates’ Court was told yesterday.

Parsons, 41, and Gilmartin, 45, both admitted outraging public decency.

The court was told there are two schools nearby although all the children had gone home as it was 5.30pm.

However, the sex session was witnessed by a teacher and an elderly woman who were out walking their dogs.

Jennifer Moss, prosecuting, said: “They came across the group while Parsons was having sex with the woman.

“They said another man joined in and was having sex with her.”

She said Parsons’s girlfriend was not charged with any offence after the incident on March 26.

In a statement, the teacher – who was not named in court – said: “I was disgusted by their behaviour. Young children could quite easily have seen what they were doing.”

Parsons, of no fixed address, was ordered to pay £193 in fines and costs.

Gilmartin, of Woodlands Avenue, Rustington, near Littlehampton, must do 80 hours unpaid community work.

District Judge Roger Ede said: “Sex is a private act not something that you do in front of others. People should be able to walk their dogs without having to watch the three of you having sex together in public.”