The One Direction heartthrob, who has been linked to a number of women and previously dated TV host Caroline Flack and Taylor Swift, insists claims he is a serial womaniser are incorrect.
Being quizzed on his sex life by Britain's GQ magazine, the 19-year-old star said: "I know the number of people I've slept with, yes. I'm definitely not telling you."
Asked for a ballpark figure, he said: "It's definitely less than 100. Yes, lower than 50."
When pushed about whether the figure was less than 30, he added: "I'm not doing this you're cornering me."
Before saying: "Yes. Two people. I've only ever had sex with two people."
Although GQ found it difficult to believe him, Harry added: "Well, that's my answer. Read from it what you will!"
Harry was most recently romantically linked to Kimberly Stewart, with the socialite's musician dad Rod admitting the 'Best Song Ever' hitmaker had spent the night at his Los Angeles house.
Rod said:"His [Harry] car was here in the morning. Let's put it that way. But he may just have come round to pick something up."