A former partner's favorite position was the missionary because she liked the full body-to-body contact with me on top of her. I did too. She almost always came first and then enjoyed the contact as I work my way to orgasm.
And as an added treat for me in this position, she had the delightful habit of using her finger to stimulate my ass. As I approached orgasm, she inserted her finger, and finger fucked me until I came. The combination of fucking and being fucked produced powerful and very satisfying orgasms.
I have incorporated this combination into my masturbation play. When I'm in the mood for anal stimulation, I lay on my back with a towel under my ass. I insert some lube into a condom, place it on my cock, and stroke until the lube is distributed throughout the condom. I then lube a thin silicone dildo - about the size of a finger - and insert it into my ass.
Stroking my cock inside of the lubed condom feels like it's inside a pussy. Stroking the dildo in my ass feels like I'm being finger fucked. The orgasms resulting from this combo are not as powerful as she helped produce, but they are strong, and they bring back very pleasant memories.