The Labour councillor for Whitby has said he lost his virginity to an alien at the age of five.
Simon Parkes, 53, said he had a "holographic sexual experience" with the alien as a child while appearing on This Morning.
He explained that he was first abducted while in his mother's womb and was thereafter frequently taken by seven foot-tall aliens named Mantids, which he had drawn pictures of.
Discussing his virginity, he said: "It was a holographic sexual experience so I didn't exactly lose my virginity ... it was using much more advanced technology than anything we have on Earth, or anything the army think they have. To aliens it's not about age, it's about experience and souls."
Parkes' story hit the headlines after appearing on a Channel 4 documentary about people who believe they have been abducted by aliens.
In Confessions of an Alien Abductee, Parkes, who is also a qualified driving instructor, said he had an alien family with an extra-terrestrial lover.
The programme explains that Parkes never knew his father and that his mother was an alcoholic. The filmmaker asks if maybe he invented the abductions as a child as a way to escape, but the councillor denies this suggestion.
Following the programme, Parkes, a married father of three, said his extra-marital activities with an alien had caused tension with his wife: "My wife found out about it and was very unhappy, clearly. That caused a few problems, but it is not on a human level, so I don't see it as wrong."
Speaking on This Morning, Parkes said his first full sexual encounter was with an "iron lady" alien: "This is an incredibly difficult for most to understand and I fully understand most can't get their head round it.
"We're talking about creatures that have the ability to go into your mind and give you images that and make you think one thing when you would think about another.
"I think these creatures would have come into my mind and make me appear to love them. Otherwise you wouldn't have a sexual reaction with somebody unless you felt something for them. I think it's more to do with that than anything else."
Explaining the various abductions more generally, Parkes added: "The only thing I can remember after that is it saying to me you will never be hurt, your will never be harmed.
"I am being monitored very closely and if there is anything that's seriously about to happen or does happen then I am fairly confident in my own mind that they will intervene, they have in the past."
Following his admission, Dorothy Clegg, the Tory councillor for nearby Scarborough, said he should resign from his post in the government: "Whitby Town Council should set its standards higher," she told the Express. "They really do need to restore a more sensible reputation. These wild stories are making them a laughing stock."
Parkes, however, says being abducted does not affect his work: "It's a personal matter and it doesn't affect my work. I'm more interested in fixing someone's leaking roof or potholes. People don't want me to talk about aliens. I get more common sense out of the aliens than out of Scarborough Town Hall."