Is it true?

So I seriously want to call bullshit on this but I gotta know..

Is it true that the older guys get, the less time they last? He keeps using this as an excuse since one of his buddies told me this.

When me and my guy were together when we were like 22 and 23, we were having sex for, at minimum, 45 minutes. There was a bit of foreplay, different positions and multiple orgasms.

Now we are 27 and 28, and I can’t even play with him long anymore. If I do, he cums and I get nothing. He might play with my butt while I jerk him off. If I give him a blowjob, I’m definitely not getting any sex, just more butt play. We have sex maybe once a week, even though I try and get it more. We used to have it all the time. I ask him if he wants to. “Maybe later.” I ask him if he’s just running his video game character around. “Just waiting for someone to get on to start the dungeon” or “maybe later”. I ask him to come cuddle. “Yeah, I’ll be there in a bit.” But he never comes. He stays glued to his tv monitor and keeps chatting with people. I’ve even cuddled into bed with him after he’s been sleeping the day away and ask and he says no. I try and play with his butt, get him hard and I just end up pleasuring him and dealing with my needs later.

But still whether I jerk him off or we have sex, it lasts less than 10 minutes, sometimes less than 5. Depending on how long it’s been since I’ve touched him.

He’s 28! He’s not even that old! What the actual fuck is happening?! I went from having mind blowing sex to “did you cum?” “No..” “Oh” and that’s it. No attempt to try to get me to have an orgasm and anything. So I just end up going to bed and doing it myself.