No you can’t. There is absolutely NO RISK in fingering, even with recent cuts and bitten cuticles.
HIV cannot just “enter the bloodstream” like some swimming fish. It really needs to be injected there, and even then, it requires specific cells to latch onto, cells that you won’t find just anywhere in your body.
Moreover, the fluids you encounter during fingering (or giving a woman oral sex for that matter) are not infectious. The infectious area of the female body would be far deeper, in the thick mucousal cervical fluids you only encounter during unprotected vaginal sex. And in unprotected vaginal sex, your urethra – the hole at the end of your penis – is the vulerable area. It contains specific cells that HIV can infect. Your finger does not.
I certainly hope that clears things up a little. You have not had an HIV risk. If you wear a condom correctly and consistently for vaginal sex, you can avoid HIV. It really is that simple.
The problem is the HIV virus cannot go inside any cell. Each cell has a cell membrane that itself acts as a wall against HIV. But the sneaky HIV virus has one key (gp120) that can open one particular lock (CD4, CCR5) that is found only on a very few cells in the area underneath the mucosa.
– Marcelo Teixeira