It's my husband's 40th soon. I desperately need ideas for a birthday bash. He's quite a quiet guy and doesn't like a big fuss, but I feel I need to do something a little social for him on this big day.
Any ideas for a nice present and bash e.g. dinner, cruise? He made a really big fuss over my 40th with a surprise party, but I do not think he would like this himself. He's a bit antisocial!
I'm at a loss

Well, you don't give much details, but I would say, whatever he likes, make it ++++ ! If he's in running, register him and organize for NYC marathon. Into food, a Michelin 3* meal. Watches, a pricey one...and so on...