"Communication" is to generic. You should look into more refined aspect of the "effective communication".

Communication - you talk, you comment, you criticize, you scold - non of these will be effective if your spouse is not willing to listen.

Effective communication - there must be certain conditions or time where the communication with your husband is more effective. It is happening around you daily, you need to be more observant to find which way of communication is more effective. Use the least resistance way to make the effective communication for the desire result.

If your husband wiling to listen, there are few things he can do :-

1) overweight will causes the bloods vessel to narrow down - the blood flow to the sex organ will be reduced. The exercise like deadlift, squat, jumping jack & burpee may help. Erection needs blood circulation.

2) as he age, the testosterone will drops, he may need some supplement like Himalaya Speman, horny goat weed extract, maca extract, or tongkat ali to raise the testosterone level.