She added: "There should be some regulations. I'm sick of seeing everybody's bum. I'm over it. Seriously, nothing is shocking any more.
"I was in a trackie, so I was alright, and people were petrified of us so it was rare for someone to put pressure on us to do anything."
Her comments come after Jay Z was accused of hypocrisy for adding his support to the #MeToo movement - for which millions worldwide have shared their stories about being sexually harassed and assaulted.
Fans pointed out on social media how the rapper's lyrics "degrade women" and "normalise sexual harassment".
Mel, whose full name is Melanie Chisholm, recalled a recently unearthed video that saw the Spice Girls hit back at a producer who had made inappropriate demands.
She continued: "Some footage came up recently of us shooting down some guy because he said, 'Put your shirt down and roll your skirt up' or something, and Mel B gave it with both hands. There was so much you accepted.
"Thank God now we're standing up, going, 'No we're not having it!"'
She added: "We just wanted to sing, be famous and travel the world, but we quickly started facing sexism. We were told girl bands didn't sell, and that gave us a bee in our bonnet! Things have improved. We made a lot of people lots of money and that's a funjy old thing for changing people's minds.
"The wonderful thing we've seen in the last decade is the majority of the biggest artists in the world are now women. Beyonce, Adele, Katy Perry, the list is endless.
"Women are dominating and I like to think the success of the Spice Girls opened doors for that to happen."
It is not the first instance of the singer being critical of the modern music industry having previously criticised girl band Little Mix for being too sexualised.
Talking about X Factor stars Little Mix in 2016, she told the Sunday People: "They are getting more provocative. To me, they were kind of the closest thing to the Spice Girls we've seen.
"They are all gorgeous and great singers. But they weren't sexy and it's got more and more that way. I love them – but I just say, 'Stay you'.
"All young women want to look sexy and hot so I understand it's hard. But I think it's such a shame. We live in a narcissistic age – it's 100 per cent worse than when I was in the Spice Girls. It was a more innocent time."
Mel said Scarlet was a big Little Mix fan but she's banned her from using social media in case she sees any inappropriate content.
She has also confessed that she avoids discussing diets around her daughter in the fear of her developing unhealthy eating patterns.
The former Spice Girl, who has previously spoken of her battle with eating disorders during the band's 1990s heyday, is mother to Scarlet, eight, and told how her ordeal has made her determined to be a good "role model" for the youngster.
"I don't want anybody talking about losing weight in front of her," Mel, whose full name is Melanie Chisholm, told Top Santé magazine.
