I don't know. I've once kissed another guy whilst being in a relationship and I felt so bad. But good thing, cause the guy was a total noob and we went out for 4 months and he didn't even hold my hand. Epic fail. But in general I can't speak for other girls.
Idk most women so I can't say. And that'd not how I define cheating. Some partners don't mind you being with other people and some people are in open relationships but romantically committed and some are committed to multiple people in polyamorous relationships
It's mainly a phenomen of white women, feminism turned them into sluts who love to hurt men. Many women love to cheat, than there are women who have a boyfriend who don't care for her etc. I read some polls, which stated that 50-60% of women cheated, more than men. But I bet if women would approach a guy, most men would cheat. Most men are to lazy to cheat. 75% of the women who cheated did't feel bad afterward. On the other side over 50% of the men who cheated felt bad afterward. I also read 20% of children are cuckold kids, women are bad. I can't count the stories of some friends who had sex with a girl who had a boyfriend and made fun of the boyfriend.