Beyond the obvious cowgirl, there's the amazon position - on your back, legs over your head (preferably tied, so you won't interrupt), erect member pulled down so it sticks between your legs and she can ride it comfortably.
First met it in a Lora Cross clip, if that's any help.

LOL. I'm now realizing that we aren't talking about strap on positions for men to be in.

Great line! Literally laughing out loud!

Yes that’s great. I never would have thought of that. A problem might be flexibility at my old age but we will see.

Ha ha. Rereading my original post I guess I could have been more explicit. Maybe stated piv. I love strapon so I’m always interested in new positions for that as well.