Old age? Affair? Dementia? Confused by DH

I agree with MawB, I had a friend who went on strong anti-depressants and they could not stop talking and seemed very happy.
I notice poster does say he is perfectly fit and does not wear glasses. Also says nothing has changed to explain his sudden happiness.
If there are no anti-depressants maybe they are adding something to the water, who knows.

I do think something sounds not right. It doesn't sound like an affair. Sounds like possible start of dementia, or bipolar or some kind of brain event eg. TIA,bleed? Maybe worth a check up though doesn't sound like he would go.

Happy pills?

I think some people have found life less stressful and are happier than usual.
Be glad he is upbeat and not a grumpy old whinger.

No stress from the others at the office or chats. Sees you in a different light. Sounds good.

Perhaps it's lockdown syndrome.

Besudes all the doom and gloom, only seeing one or two people and not going far limits your horizons, so perhaps he's trying to keep cheerful by finding something good or interesting in the mundane.

I am really really trying to take an interest in snooker. It's very hard but someone has to do it besides DH who keeps telling me about every move.
? ??

I'd go along with his jollyness and say nothing.

I was about to say more or less what Lemon said but she beat me to it. Not The Body Snatchers bit but all the rest.
During lockdown I find myself looking more at everything and appreciating things I formerly took for granted. Mr P is the same and we're chatting more than ever about lots of unusual things.
Hope that's what it is and that you can enjoy his new found zest for life.

I wonder if he is on any sort of anti-depressant or stimulant? Prescription or otherwise?
I think somebody suggested checking the drinks cupboard, but it sounds rather as if he is “on something”

BTW
Can you help with something from your OP please?
I am racking my brains to work out what you meant to say by
... all very venison bemusing (5th paragraph)

I think, in your position, I'd just ask him why he was so upbeat and cheerful all of a sudden.

Remember the film The Body Snatchers? ?
Seriously though, it’s probably all the working from home and lack of stress, time to think, and the two of you being more thrown together than normal.
We chat all the time along those lines?

Has he been out without telling you where?Any strange phone behaviour? If not probably just glad lockdown is easing.

If he is holding normal conversations and has no other subtle changes I wouldn’t worry having said that you know him best, listen to your gut if it’s telling something isn’t right you could be on to something I’d be watching out for other signs. I hope it’s nothing but good mood.

Have you asked him where his new found enthusiasm for life stems from? Has lockdown given him time and space to think of all the positives in his life? Is he just happy to have survived so far? More importantly have you checked the contents of your drinks cabinet?