What do you suggest if I seem to get utis every now and then. I try to drink plenty water. Can too much masturbation cause utis?

Proven infection? Masturbation does not cause urinary infection. Frequent masturbation however may irritate the genitalia and lead to discomfort with urination. A urine culture will verify whether or not you are actually having infection. Have your urine tested appropriately with your doctor to guide proper therapy and treatment.
Unlikely. Unless masturbation involves in fingering urethral meatus. Suggest urinate after sex or master nation. Don't withhold urination. Wear cotton underwear ; avoid thongs. Shower, rather than bathe ; never use bubble-bath. Avoid constipation. Spread thighs as widely as possible with urination.