The murder trial of Graham Dwyer has been hearing evidence from men who say they met childcare worker Elaine O'Hara on a sex website.
The architect from Kerrymount Close in Foxrock denies stabbing the childcare worker for his own sexual gratification in the Dublin mountains in August 2012.
A court has heard Elaine O'Hara complained to a man she met on an adult website about non-consensual cutting marks on her abdomen.
The court heard from a number of witnesses who made contact with Elaine O'Hara on sex web sites.
One of them, Mark Guerin used the moniker time2killinDublin on alt.com which the jury's heard is an S&M type site.
He gave evidence Elaine O'Hara was nervous when he visited her bedsit accommodation in Blackrock about five years ago.
He agreed with the prosecution that she spoke about self harming, another partner she'd had, and cutting marks on her abdomen that were not consensual.
He said he didn't have sex with her that time but did on another occasion. However he concluded they were not compatible for play as she was into restraint, degradation and blood letting and he liked light kink.
Robert Cullen-Jones said he met Ms O'Hara (36) in March 2011 on alt.com - a website for people who like to be submissive or dominant in sexual relations.
His profile name was 'Dublin_master' while the childcare worker used 'helpmelearn36f'.
The jury heard she described herself as an on-and-off sub with a lot to learn who wanted to be a 24/7 slave for someone strict but also trustworthy and possibly caring.
He said they met in Dundrum Shopping Centre in April 2011, and went to her apartment for sex.
The jury heard she showed him sexual paraphernalia like handcuffs and vibrators, discussed her fantasies about bondage and said she was involved with another man who she did not name.
He told the prosecution this was the only fantasy she discussed with him.
He said they met in Dundrum again in May 2012 - she mentioned being depressed and he was aware one of her parents had died.
He said they did not go back to hers this time, and it just sort of fizzled out afterwards.
