Why do some people look down on those who have many sexual experiences with different people?
There are lots of derogatory words for such people. They might be called “dogs” or “players” or “sluts” or “whores.” They might be considered philanderers or cheaters. Oh I’m sure there are many other words people use.
Now I don’t have access to a survey that would tell me how many people look down on such people, but my impression is that it is pretty universal. Still, in the interests of not making generalizations, I will say “some” people look down on this type of person.
Do you look down on them? what are your reasons for doing so? If you don’t look down on them, why do you think other people do? Is it because everyone looks down on them? It’s just the easy thing to do? Is it because they think sex is dirty? Religion? Something more basic? What’s going on here, in your opinion?