Hmm, I've spent most of my life in denial so masturbation was never a dysphoric activity for me. I started quite young, and have enjoyed it most of my life - though I've always known that I am different sexually than most of my male friends. My masturbation is mostly mental, and it takes me much longer than most men to climax (I used to be proud of this fact until I realized it's probably because of my dysphoria). Masturbation ranges 30 minutes to an hour for me to climax, which means I don't do it very often at all. Once I came out to myself, I found it hard to masturbate at all for a while, but now I just imagine myself as a woman and I'm able to get through it, just once a week or so to keep me from going insane as I don't have an SO at the moment and not masturbating puts you into a different state of being for the most part (I've noticed).
In terms of sexual experiences though, women have always found it odd that I'd much rather go down on them then engage in penitrative sex. I've never climaxed from intercourse, and I've only climaxed a handful of times from any activity with women due to (I realize now) dysphoria.
As a child I was obsessed with female gentilia, and from the age of 5 to 8 or so, I drew myself with what I imagined was 'girl parts', over and over and then - in shame - hid the drawings or threw them away secretly. You'd think that would have been a clear indication of my dysphoria but apparently that wasn't enough for me to figure it out -_-