My IRL experience is generally ~20-40min nonstop with one or two position changes, but that’s after years of experience together. You’re not gonna find that with anyone right away, you have to get to know both your own body and theirs, what the limits are, what the triggers are. Good sex takes work to achieve, from all parties. You’ll get there.
http://www.noloop.me/The_Stunned_-_Almost_Everyone_Is_A_Little_Bisexual