Yes- they're known as "Towel Raises". I wouldn't be as concerned with size increases ass I would with strength and [words=http://fleshlight.sjv.io/c/348327/302851/4702]stamina[/words] regarding the BC/PC.
Here's a description of the exercise:
This is an AWESOME exercise for developing penile strength and rock hard erections!
With an erection, place a towel over the end of your penis. Try to lift your towel-covered penis by squeezing the PC muscle (as in kegels.) Start with 20 reps and work up to 100 reps 5 times a week.
As time goes by, you can add
weight by using larger towels, or even by wetting the towel.
An advanced technique for Towel Raises would be to hold the towel in the up position for 10 to 20 seconds at a time. You should attempt to work up to 5 to 10 of these sustained repetitions.