The Overton window for porn has shifted over the years. I believe this is based on access.

Example: pre internet, access was video tape. Prior to video tape, access was magazines. Before the big brands Penthouse and Hustler, porn was very niche and on 8mm "stage films".

Along the way, access has desensitized men. This in my opinion has not made men better sexually.

The next argument is, what is "better"?

Instant gratification visually? I'd say no.

Healthy depiction of women? I'd say no.

Ability for romance or courtship? No.

In answer to the question... porn is and always has been available. It has always had an impact socially and it is in the way men choose to "use" this stimulus that is judged. Therefore I'd say neither. This shifts the onus and responsibilities to the users not the media.

Choose wisely brothers. You might be FUCKING your future.