Hi tomas
I've used the Bathmate for a while and also a Somaerect VED. I basically use the Bathmate for regular muscle flexation, if that's a word, to try and maintain my penis's flexibility. Like most muscles, if you don't use, you lose it. I had a RALP and all the seminal vessels were removed, so I do not have any nocturnal or natural erections. I use the Bathmate every other day. I stand over the bath, or sink and fill the Bathmate with warm water. I then place the Bathmate over my flaccid penis and bring it tight to my body. I make sure my testicles are not inside and then compress the Bathmate against my body. When doing this, water will jet out the end nozzle. I do this fairly slowly several times, until I've achieved a full erection inside the cone. I usually maintain this for a minute, then I'll press the button on the nozzle and the water will come out and my penis will shrink. There isn't a constriction ring, so unlike the Soma I can't maintain the erection, so it's just for penis health.
Hope this helps
Jerry