i need your opinion on this photo fellow mylotters!

so its really not like me to post a discussion on this but i'm really confused and your the best people for the job of giving an answer. so this person i emailed this picture to who is interested in buying the horse in the picture asked if he was kid friendly because i had a child on him in the picture. when i saw this i went what do i look that young! this picture is only a couple years old and i'm the same height and look the same as i did then or at least i think i do? so i'm asking you my fellow mylotters how old do i look in this picture? and do you think i seem to act older than i am or do you think this was just an assumption based on the fact that i'm selling a horse that made her think that the person in the picture was maybe my own child and not me? i'm 21 and 5'4 by the way i guess that might be relevant.