So you start dating a guy you really like, everything goes great and then, at some point, you find out from your friends or from the guy himself that shortly before he met you, his dating life was quite… “colorful” - he was sleeping around with many women, having many short relationships and one-night stands. You find this both disturbing and embarrassing, and you don’t know what to think of him. You start doubting the trule value of your relationship. Should you break up with him just because of his dating ast? That wouldn’t make sense. After all, it’s his past - it’s the time when you weren’t even in the picture, so how can you blame him for something that’s not even directly related to you? Surely, his lifestyle was morally and ethically questionable, but let's face the truth: most guys dream about sleeping around at one point in their life or another, but few can actually "excute." 

If you are determined to overcome that concern caused by this discovery your his past, there is one very effective solution to this issue and this requires a two-step approach:

First, recognize and accept that the vast majority of men are subjected to this powerful drive towards novelty and variety when it comes to dating women and sex. Don’t judge this part of a typical man's physiology, criticising it and condemning it, even if jusitified, won't make any difference and certainly won't help eliminate how you feel about this. Instead, truly accept it as part of male nature. This doesn’t mean that you should tolerate unfaithfulness, but you should definitely learn to recognize that that’s what young, healthy, single men often do at one stage of their life or another - they sleep around, and sometimes it benefits guys tremendously. 

Secondly, change your perception of his sexual past. Instead of seeing it as a stain on his moral reputation, see the good that in it - if the guy had many dating partners, this means that he is a popular, attractive man who has something about him that many women want. Further, his dating and sexual experience probably made him a better lover and sex partner, and also allowed him to better understand himself and what he is looking for in a woman. That, in turn, might have just allowed him to make a more informed and correct choice of a dating partner, which is - you!

So, don’t let his sexual past get to you. It’s in the past, and if anything, it probably benefits you more than it hurts. And hey, you might just learn something fun and exciting about love, sex and intimacy from him while being with him - whether it turns out to be a short-term dating situation or a lifetime partnership. 

Also, remember - if he didn't have a "colorful" dating life before meeting you, he probably wouldn't have been as attractive to you. After all - there is a reason why the guy is popular among women.  Be it his looks, personality, character, behavior, financial status - any of those qualities make the guy more attractive to you as well.