There is no difference, really. Getting to the basics, whether a man is having multiple partners o a woman, they're still using their genitals for sex, and they both are at risk for STDs and unwanted pregnancies. But I guess the difference te see is based on the culture we live in, where men must conquer and dominate every single human being (violently towards men and sexually towards women) in order to establish that he has a penis and women must be the pure (naive, unused) damsel waiting for the right one. It's harmful and dehumanizes both genders because it visualizzazioni men as emotionless machines that must destroy o be destoyed and women as mindless sex bambole with no natural urges. Yes, my dear, society sucks that hard.
I don't think any guy is to blame for calling a girl a $L*t. coz from wat I know is that u girls call each other that, we just copy! something to do wit jealousy o whatever (this is gonna sound bad) but as a dude we have gotta make use of our tools n be happy they work ;) …crazy stuff oh n so the difference is girls get jealous dudes stay proud.