Nice to meet you. You know him better than anyone here- I he's insecure, jealous, or possessive I would say he's probably not going to be down with it. Otherwise just bring it to him in a non threatening manner and see how it goes....
One think to think about though is whether you are OK with this same scenario in reverse. .. If he says yeah sure and I would Ike to bring in another woman. Can you handle that dynamic ?
Hope things work out well for you
Me- Linkin Park- the husband. I am the youngest, fast paced and admittedly full of issues.
Nina Simone- our wife- slow, gritty, and sexy like a smoky piano bar and a glass of brandy.
Led Zepplin- our wife - a rocker little tomboy that loves with everything. All she's got or nothing at all.