Charlie Sheen explains why he doesn't like Donald Trump

Charlie Sheen is not a fan of Donald Trump, and it’s not just for political reasons. The former Two and a Half Men star appeared on The Graham Norton Show to tell a personal story about the disappointing interaction he had with the Republican presidential nominee about five years ago.

“I was at a dinner with my ex-wife Brooke [Mueller] and her family, and about halfway through I noticed Donald staring at my watch,” Sheen said. “He says, ‘I want to give you an early wedding gift as a gesture from me and Melania’ — and she doesn’t say a word; she’s very sweet and very pretty but she just kind of sits there. Anyhow, so he says ‘These are platinum diamond Harry Winston’ and he pulls off his cufflinks and he gives them to me.”

“Smashcut to about six months later, I had some jewelry getting appraised at the house,” Sheen continued. “She took the loop, spent about four seconds, and kind of recoiled from it — much like people do from Trump — and says ‘In their finest moment, this is cheap pewter and bad zirconias.’ And they’re stamped ‘Trump,’ and I just thought, ‘What does this really say about the man, that he said, ‘Here’s a great wedding gift,’ and it’s just a bag of dog sh–?’”

But Sheen’s appearance on the show wasn’t all about dissing Donald — he also talked about the support he’s received from his father, Martin Sheen, through his turbulent years, including his recent admission of being HIV-positive. Read the kind words Sheen had for his “hero” father on PEOPLE.com.