Why is my sexual stamina all over the place?

r/

Context: I’ve hooked up with some women and literally have issues finishing at times or have to be intentional about it. There’s other women who I have sex with and I feel like I’m fighting for my god damn life to not finish in short order.

There was a period of time where I couldn’t finish with women in my teens but am well past that now. I also notice that sometimes if a women doesn’t go ham on my junk and takes the time to let me ease into it I also get that same experience of being able to finish on my own terms. I’m not 100% sure what’s going on and sex isn’t a massive priority for me but maybe there are some men on reddit who are more well versed that could help explain or offer some perspective.

Appreciate any advice, perspective, and time given. Thanks everyone!