That's a big piece of Seinfeld's innovation. Elaine wasn't a typical sitcom female lead.The 90's comedy conception of hetero relationships where women don't like sex and men are constantly trying to avoid spending time with their partner to do guy things kinda kills the funny for me. Seinfeld isn't as much about this, but there are elements here and there. It's still a funny show regardless. Everybody Loves Raymond is entirely about this relationship dynamic and it's the fucking worst. Friends is fairly in opposition to this dynamic with its relationships and it holds up decently today some homophobia notwithstanding.
Elaine was as raunchy as the men. She was into sex as much as the men when bragged about her exploits. There was an entire episode about her buying massive amounts of contraceptives even.