I understand that some of us wants her a pure, virgin superheroine of righteousness who doesn't even have sex unless with her one and only true love? Nice, congratz, very romantic...
For many of us, whether they are a virgin or not, whether they are pure or not doesn't matter in the slightest.
It's all about getting a girl to do something they do not want to do. That means that at the start they don't want it, they don't enjoy it, and they find it unwelcome. It could be due to innocence, it could be due to reluctance, it could be due to the wrong sexual orientation, it could be due to them wanting to be faithful to their husband/boyfriend/girlfriend/wife, it could be due to them not being attracted to the other person, etc.
It's the whole concept behind "mind break" or "corruption". A 30 year old woman who has children could still have the same, "OMG, what is happening?" feeling as an 18 year old virgin if it is something that is unexpected and unwanted.
I understand where Doki Ninja is going with this after his explanation, but even then the change could be more gradual. Sure, the first time it happened (not the fondling part where the example takes place) it could be unexpected and unwanted. The second time could still be unexpected if she confronted the old patient and he said it was all an "accident." The third time it may not be unexpected, but it could still be unwelcome, etc.
Even after first and second contact (grabbing), something new being introduced (fondling) could still bring back the unexpectedness of something.
The process of breaking down a woman's resistance is more enjoyable than just getting handed a slut who enjoys it for some of us.
If a timeline went from 1 - 10. I'd rather have the time from 1-9 be the process of breaking down/corrupting a woman and only having the slut at the very end. After going through the corruption process, the slut part is a nice reward, but tends to be boring if that's all it is after that. At that point I'd rather just move on to a different woman in a game.