Is it normal bubble baths give me a boner?

I don’t know why but whenever I take a bath, I pour bubble mix in it to make it foam up because it makes me extremely horny. Just the feeling of all of the foam touching my body gives me a warm orgasmic feeling. I like to enter the tub nice and slow and just kind of sink in to the bubbly foam…and up up up my penis goes.
The hard throbbing boner lasts until I’m done bathing. Sometimes if I feel good enough, I’ll just end up cumming. The experience is so great that I’m still hard for a little while after.
Is this normal?