Well, if you want to use Ephebophilia, you need to establish primary sexual preference, not simply sexual interest. Setting that aside, however...
You talk about colloquial definitions, but colloquial definitions vary. When you say "pedophile", I indeed think of sexual desire in an adult for a child (usually preferential desire, but I suppose it doesn't have to be such). However, "child" in this context (as well as most others) refers to a pre-pubescent minor. So, when you say "pedophile", it conjures up imagery of some middle-aged adult and some 10-year old (or perhaps younger!). Same goes for terms like "child sex-trafficking" and "child pornography" --- these all conjure up images of pre-pubescent children for me. Given the reactions by various people on HN (and indeed my perception of the views of people in my bubble of the world), I don't seem to be alone in this.
Teen-sex-connesieur is ridiculous; I don't think anyone would actually suggest that. But the words you are using carry connotations for many, that you don't seem to be expecting. If these connotations do not match what you are trying to communicate, you might consider some adjustment to your language. Perhaps "teen" "underage" or "minor" would be more suitable words here (I would lean towards the first or second, personally).
---
P.S. And yes, while I do see a difference between a 25 year old and a 16 year old in terms of sexual maturity, I also see a dramatic difference between adult interest in a 16 year old and adult interest in an 8 year old. So I don't think "pedophilia" is a good blanket term to describe adult sexual interest in individuals below the age of 18.
You talk about colloquial definitions, but colloquial definitions vary. When you say "pedophile", I indeed think of sexual desire in an adult for a child (usually preferential desire, but I suppose it doesn't have to be such). However, "child" in this context (as well as most others) refers to a pre-pubescent minor. So, when you say "pedophile", it conjures up imagery of some middle-aged adult and some 10-year old (or perhaps younger!). Same goes for terms like "child sex-trafficking" and "child pornography" --- these all conjure up images of pre-pubescent children for me. Given the reactions by various people on HN (and indeed my perception of the views of people in my bubble of the world), I don't seem to be alone in this.
Teen-sex-connesieur is ridiculous; I don't think anyone would actually suggest that. But the words you are using carry connotations for many, that you don't seem to be expecting. If these connotations do not match what you are trying to communicate, you might consider some adjustment to your language. Perhaps "teen" "underage" or "minor" would be more suitable words here (I would lean towards the first or second, personally).
---
P.S. And yes, while I do see a difference between a 25 year old and a 16 year old in terms of sexual maturity, I also see a dramatic difference between adult interest in a 16 year old and adult interest in an 8 year old. So I don't think "pedophilia" is a good blanket term to describe adult sexual interest in individuals below the age of 18.