The 'Troublemaker' singer insisted that other people, including his Xtra Factor co-host Caroline Flack, are responsible for bigging-up the contents of his trousers.
"I have never, honest to God, tried to emphasise it," he told Heat. "It has always been other people - The X Factor, Caroline, magazines.
"There are millions of guys that wear tight trousers who have bulges every single day. I have never thought of myself as someone who has a big bulge."
However, Murs continued: "This is probably the first time I will ever be arrogant by saying I have never had a complaint... Fifty Shades of Murs is out next year."
On his flirtatious relationship with Flack, Murs said: "I know it is really hard to try and convince people that nothing's ever happened [but] people are so off the mark with me and Caroline.
"I think she is clearly sexy and attractive... I would be gay if I didn't think that I fancied her a little bit.
"[But] when she was dating Harry Styles last year, I wasn't getting jealous and going, 'Oh my God, I really fancy you'."
Murs is on course to achieve a UK chart double this week with 'Troublemaker' and his third studio album Right Place Right Time.
Watch Olly Murs in the video for 'Troublemaker' below: