Charlie Sheen is "terrible" at marriage.

Charlie Sheen

Charlie Sheen

The 50-year-old actor - who announced last year that he is HIV positive - was previously wed to Donna Peele, Denise Richards and Brooke Mueller and though he was engaged to porn star Scottine Ross for nine months in 2014, the 'Anger Management' star has no plans to tie the knot ever again.

He said: "I think I'd sooner walk on the moon in exactly what I'm wearing then head back to the altar... When you're terrible at something, why keep doing it... I'm zero for three."

However, Charlie insisted he doesn't even have the time to date right now.

He told 'Extra': "There's nobody special right now. I'm not dating. I got my hands full with dealing with my health, taking care of my family."

Despite previously being known for his wild partying, Charlie - who has a grown-up daughter, Cassandra, with former girlfriend Paula Profit, daughters Sam, 12, and Lola, 11, with Denise, and twin sons Bob and Max, seven, with Brooke - has curbed his lifestyle and is taking much better care of himself, but insisted it hasn't just stemmed from his HIV diagnosis.

He said: "Exercise, diet... don't go on benders anymore, don't drink as much.

"It was the combination of a lot of the self-loathing a lot of the shame behind it that I just wanted to keep myself divorced from reality... I just woke up one day and said, 'I deserve better.'"

The former 'Two and a Half Men' star has been announced as a brand ambassador for LELO's new condom line in a bid to promote safe sex and thinks he is the best representative to speak about the importance of contraception.

He quipped: "Shouldn't a guy with five kids, a granddaughter and HIV be buying condoms and not selling them, but it does kind of make perfect sense. I don't know if there is a better 'spokesperson' past, future and present to talk about the importance of condoms and the stigma they've had for so long."