Well, when you are an adult you give up playing with rubber duckies and boats in the bath. So, what do you take the the tub with you when you are a horny young woman. lol
How about tying your own breasts up just because you are in a kinky mood and have given up BDSM the last few months and do not want to get into anything too extreme in your present state. So, that is what you do you tie up your own breasts medium tight and take a butt plug with you to the bath you sit down in the tub on said butt plug till it is in and you lay back with your breasts bound and start playing with your nipples and let the warm water cover you.
After a short while of this you get more and more hot and you take the shower and start running this over your clit and start moaning and groaning. Then comes the big mistake you grab a hold of the ropes you have tied to yourself and you pull em tighter.
Once you have cum then you realize what you have done. You have made the knots so tight that you cannot untie them. lol
Other than that your experience in the tub is fantastic. :)