You mean they need the added stimulation of porn viewing in order to get them ‘excited’ for the opposite sex?
Or that they masturbate?
Masturbate.
It is the unsaid story of porn.
Families have husbands watching and masturbating to porn. Disconnected from wives.
Sex within marriage is much more than orgasm.
These guys do not use sex to connect with their mates.
The women think that there is something wrong with them.
But it is men who cannot have sex with a live woman.