I cant speak for all twinks and all mature older guys, however in my experience, this has definitely been 100% the case. Especially my first much older partner when I was a lot younger and new to MM sex.
I had a really naive innocent attitude when he first approached me if I wanted a massage, I literally had no idea until later it was at the time my feminine smooth hairless body that turned him on. While he took his time to fuck me over the course of several weeks, I was moaning and whimpering well before he fucked me. Each time we spent together he progressed slowly and gradually doing more and trying more things with me.
Youre right at the time, I was so grateful to be adored and worshipped in that manner, aside from turning up several times a week for a "massage", it was only when he fucked me that I felt the innate desire to please him and do whatever he wanted and needed.
At the time, I had no idea it was only my body that he plucked and cherished. The thing for me with MM sex, just because I knew I had all the "power" in our sexual encounters, I never not once took advantage or use that as leverage. I enjoyed and craved the how we make me his bitch and moan and whimper and given I wanted to keep that side private, he was the perfect guy to have my first MM sex with.