A lot of girls do this. Face and bare tits in the same shot give no room for "plausible deniability". It probably also feels a bit safer to not have your face in it. What really makes me laugh is when the girl's body has unique tattoos, birth marks, moles, scars, blemishes, etc. yet they still don't want to show face.
Check out Norajoy (https://simpcityopen.com/threads/6770/). She literally puts makeup over her tattoos. Thankfully, the makeup does nothing to hide that it's her.