It would be impolite to ask -- but then the smile filling horse trainer Peter Casey's face told its own story.

The diminutive Mr Casey, a grandfather, champion trainer and now internet sensation, was fielding calls from around the world yesterday following his saucy comments on live television after seeing his horse Flemenstar romp home at Leopardstown at the weekend.

"I can't believe it. I can't believe it. I'll sleep tonight. I'll have f**kin' sex tonight and everything," he told bemused RTE presenter Tracy Piggott.

Back home at his stables outside Stamullen on the Meath/Dublin border yesterday afternoon, Mr Casey was relying on his 16-year-old grandson Sam to keep him up to date on his YouTube progress -- over 120,000 hits and rising.

"I just say what comes into my head. I said the wrong thing, didn't I?" he asked with a mischievous grin after he was asked by the Irish Independent if he had become caught up in the excitement of the occasion.

"When you win a Group 1 by 19 lengths, it's unreal. If it was by two or three lengths, it wouldn't be the same. It lifted the country all up. Fellas looking at the racing would have fallen off their armchairs laughing."

Mr Casey, who said he is aged "over 70", denied being aware of the full extent of his internet celebrity.

"I know nothing about it. The only tube I know is in a tractor and the only net I know is putting it in the back of the Kerry net," joked the true-blue Dublin supporter.

"I know nothing about that, but I'm still able for the other thing," he laughed uproariously.

He and his wife Junie will be 50 years married this year and the frisky pensioner gleefully reported that his beloved was "making me feel randy" as they toured the stable yard.

Mrs Casey was at home at the stables caring for a sheep that was lambing when she dashed into the house to catch the all-important race on Sunday.

However, she was watching it on a racing channel and not RTE where her husband made his infamous statement.

"Of course I was thrilled looking at the race. Next I started getting phone calls from people saying 'God, you'd better be minding yourself tonight'," she said.

"My daughter-in-law had it taped so I saw it down in her house. I just thought: 'Jesus, what did he say that for?'"

The couple will celebrate their golden wedding anniversary at Easter with Mrs Casey attributing their successful marriage to never having an argument. "We might have a little, small row but we always have plenty of sex -- I'm fine, I love it," chipped in her other half.