This has nothing to do with 1950 mentality.
My long term friends and I don't call each other just to talk. We call only when we are running late etc.
Why would be treat men any different?
* because romantic relationships are not usually built and maintained the same way friendships are.
* contact is part of the bonding process in the establishment phase of a relationship. by definition, long term friends are already past the establishment phase, so those relationships have little relevance to this issue.
also, the larger context here is reciprocity: there was a perceived imbalance backed by a reason he found unreasonable. if two people are dating, hardly ever call each other and are happy with the arrangement, there's no reciprocity issue.