hiv transmission via semen on finger?

Hi Doctors,

I am a man and recently had a sexual encounter with a man in which we exchanged handjobs.

After I masturbated him, he ejaculated and then began masturbating me immediately afterwards.  While masturbating me, he unexpectedly and briefly slipped his finger into my anus.

I am now concerned that he made have had a small amount of his own semen on his finger when he did this.

Is there any substantial probability of transmitting hiv in this manner?

Thanks

[sexualhealth]

Inserting a finger into someone's anus or vagina would only be an HIV risk if the finger had cuts or sores on it and if there was direct contact with HIV infected blood, vaginal fluids or semen from the other person. There might also be a risk if the person doing the fingering had HIV and their finger was bleeding.

http://www.avert.org/faq1.htm

[Vance2335]

Masterbation is not a risk.