Why though? It is an interesting issue when you look closer. For an individual, it's more obvious - I wouldn't like to be with a prostitute because of possible hidden diseases and lack of trust - but there is no way of telling how many sexual contacts my new partner had, whether paid for or not.
But I wouldn't have any problem working with an ex-pro in the same company or team, they would be just a colleague like all the rest, and I can't imagine any adult making any immature comments about the past of any colleagues on my team.