If somebody puts or allows somebody to put pictures online, everybody have all rights to look at them.
You should not feel anything at all. If this is a person has photos of something or somebody that uploads stuff. Again if this is a person you sleep with you both should be open about various "ideas" irregardless if they are sane or not sane at all.
I am not putting age on the table. It is rude to ask for any girls age, as long they stay fit, trim, and are active somehow.