If you think about it from the bright side, I care about you and am afraid that you will be taken advantage of by others like the photo.

If he is from the bad side, he may be testing your bottom line to see how you react and what kind of offensive he can take against you. Or if you accept this photo calmly, then it means that If you are very open-minded, then it is possible that when you two are intimate or something, he will magnify it even more~