HELP husband looking for someone else?!?!? EDIT***

So me and my husband had a heart to heart the other day and he let me know that he thinks sex is a little boring. He was suggesting incorporating someone else (so a threesome) which im open to, but the biggest issue he had was that he feels like hes doing all the work all the time. Which, tbh, is kinda true. He wants me to be on top more, which is cool, except that he says he cant feel anything when I'm on topm like it just feels repetitive.

I have tried googling different ways to do it, grinding, hopping, twirling my hips, and nothing is making it better. He says it's just not as tight as when I'm in other positions.

Do u guys have any suggestions? Anything that could help??

UPDATE EDIT***

Thabk you to everyone who has responded and offered their advice. I'm going to try the chair things with him next time and see if it helps.

As for the comments about the threesome, I am totally open to it (I'm bi) and that was actually something I brought up a while ago when I said sex was getting a little boring, so please dont think hes just out here tryna get whatever vagina he can lol.