Lady GaGa thinks a threesome would be ''fun''.

The 'Dope' singer has been dating actor Taylor Kinney since meeting on the set of her video 'You and I' in July 2012, and though she insists they are in a ''monogamous'' relationship, she is open to bringing another woman into the bedroom.

Asked by Sirius XM DJ Howard Stern if she would be open to sexual experimentation with more than one partner, she said: ''That sounds like fun!''

She then added: ''Here's the thing. I'm not the type of person that's having sex all the time with lots of random people. I don't do that. I'm in a monogamous relationship, we're having a good time, we've been together awhile . . . If it were to come up, it comes up.''

The 27-year-old singer - who recently admitted battling an addiction to marijuana - feels ''lucky'' to be dating the 32-year-old hunk because he is accepting of her for who she is and doesn't care about her fame.

She said: ''I'm lucky to be with someone who has a great job and he cares about his job...

''To be fair, he has stuck it out with me for a very long time through drug habits and all those sorts of things. So he's a really lovely, amazing person. And he also doesn't care about me being famous. I'm not famous to him, I'm his baby.''

And though they spend a lot of time apart, Gaga insists they don't have ''rules'' to keep their relationship strong and are comfortable having no contact for days at a time because they have so much trust in one another.

She said: ''We don't have any rules about calling each other at certain times ... We'll go days at time without talking and then we'll talk for every day. The way that it really works is that we trust each other.

''He's on his journey and I'm on mine and we're gypsies. And then when we're together, we're really in love and that's it.''