For me it's got nothing to do with bareback or stds'. It's down to the fact I am a heterosexual woman only wanting to have sex with heterosexual men. Just because I sell sex doesn't mean I have to have sex with females or guys who are bi etc. Neither is it an open door policy to everyone who calls for a booking. This job is extremely intimate, it's not like refusing entry to a nightclub.
It's my sexual preference not homophobia. Because if that was the case every heterosexual person not wanting to have sex with gay/bi would be classed as homophobic.
Now I have no doubt that I will have seen men who have played with other cocks, but as long as I don't know I don't care, but if I do know then it would be a polite decline from me.