Expert Q & A Answers About HIV on objects

Is it possible to get AIDS from saliva?

Is it possible to get AIDS from saliva? My friend licked his finger while flipping the pages of a book and I immediately touched it, since I was explaining something. My thumb has a skin condition and has open cuts. My friend is gay and I’m not familiar with his sexual past. I heard that gay people are more likely to have AIDS - is this true? And if he does have AIDS, is it possible that I’m infected?