**WARNING: EXPLICIT CONTENT BELOW**
Tanya Coombes was travelling on the busy motorway with pals on Friday when she noticed the brazen lad “acting like it was the best day of his life”.
As they passed the Ford Fiesta near Lancaster, she whipped out her phone to film a woman’s bobbing head coming up from the motorist’s lap.
Tanya, 25, said the passenger was “mortified” when she lifted her head to find people watching.
“She was performing oral sex on him and was obviously mortified as she lifted her head up,” she claimed.
Tanya Coombes, camerawoman
“Her head went straight into her hands – he’s got a look on his face that says he thinks he’s the best thing since sliced bread.”
At the time, the group found the situation funny but Tanya later realised the dangers behind it.
“There’s a time and place for that kind of thing, it’s disgusting,” she added.
“You’re going down the M6 for god’s sake, it’s a high-speed motorway.
“Our van is restricted to 70mph and we overtook him, not at any tremendous speed, so he was probably doing 65mph.
“A multitude of things could have happened. The motorway wasn’t quiet that evening as it was Bank Holiday weekend – everyone was travelling.
“He could have gone into the back of somebody, drifted into someone else’s lane and gone into someone else’s path, where would that have left her with her head being down there?
“We found it really funny but afterwards we did think what could have happened if there had been an accident, his missus could have been really hurt.”
Tanya also said – given it was a Bank Holiday weekend – families with kids could have driven past and noticed the act.
A spokesperson for Lancashire Constabulary said they had not been made aware of the incident.
It comes just days after another woman appeared to perform a sex act on a well-dressed man in the middle of a busy street.