What makes pederasty different from homosexuality is simply this:
The legislator has no business to interfere with any type of consensual adult sexuality. Even heterosexual couples sometimes do things others may consider 'unnatural'.

Only if the 'consensual' part is missing (rape etc.) or the 'adult' part is missing in one partner (pederasty, paedophily) it becomes the business of the legislator to interfere.

No one expects everybody to find every kind of sex admirable or tasteful. Just accept that others may think differently. If they find an adult partner sharing their preferences it is just a matter of tolerance to accept what they are doing between themselves.

Wolfgang