But, it's not dishonest in that case. If people are free to add partners as they like - then you can not _ensure_ that one of their partners (or their partner's

But, it's not dishonest in that case. If people are free to add partners as they like - then you can not _ensure_ that one of their partners (or their partner's partners, or partner's partner's partners, you get the point) respects that. It increases the odds of getting an STD I believe. But I don't have numbers to back that up nor do I feel like looking for them now (sorry)