I first learned to masturbate in the bathtub when I was a teenager by stoking down the length of my erection with one hand (making sure to stimulate ring around the underside of my glans and then follow with my left hand. I then continue to slide them down my shaft alternating hands. Do other guys masturbate that way. I have not seen it very often in porn and it is still my default technique after many years.
Yes, I have seen it done it that way before in porn (solo male obviously), but I can’t actually do it that way myself cause it kind of hurts (too sensitive).
Yes, I have masturbated using the alternating hands technique you described. Not so much recently, but I did do it that way every now and then as a teenager, usually on my back on my bed or in the bathtub as you did, and after lubing up the whole length of my dick with Vaseline. It never took very long that way.