The quickness or the readiness or the keen interest to learn something new or to involve in something new which can make a person anxious is called as enthusiastic
.
Fanatic also provides the same meaning as that of enthusiastic and it makes the person to do something fanatically
.
Prefixes and Suffixes are added before or after sentences to make complete meaning of the sentence
.
Here with the suffix tic the synonym of the word enthusiastic is given
.
I disaggre because depending on the photo depends on the impact. If the phototismocking someone it is not harmless.But if a regaluar photo yes it is harmless.