pesar: i like to know what ladies think and feel about this question.
I'm assuming here we are talking about guys who date more than 1 woman at a time. Not all guys seek this, but many do. Some men have enough self-awareness to know they just aren't very good at commitment. As long as no-one is being misled, it's all good in my eyes.
Why do guys want to date more than one woman at a time? Because they can....& because there are obviously women who are also happy with the arrangement. I don't think the motives are complicated or that guys plan it either.
I think they just get restless for new experiences. Similar to how women only like the clothes they haven't bought yet. Like I said, there's no harm done unless of course, the guy is telling each girlfriend she's the only one. Then he's a jerk.