No passion could explain having no erections. He does have erections. So 1) no passion is not a good explanation, 2) Cialis is not a relevant solution.

He is not old - men twice his age can do it. So he should not be blaming his age.

The first step, in terms of differential diagnosis, is to see if there are medications that are, basically, the culprit (as bighands advised). Medications can do all sorts of trouble - either disable erections, or remove the pleasure component from ejaculations (ejaculations happen, technically, but are anhedonic), or, perhaps, non-ejaculating.

If that fails, he or you will need to talk to a sex therapist or a professional sex educator or someone with credentials in the field.