It would depend... First of all, prostitutes, who knows who they slept with and second, I would question his character. What is his view on women? What are his views on me? How does he view sex?
He would have to explain why... I mean, if he did a lot of bad things in the past but later transformed for the better and BEFORE I get into that relationship and he was clean of any disease then maybe, as long as he was fully committed to me and marry me and I know and trust him really, really, really, really well, like, really well.