I had a similar story back in 1987 during basic training. We were pack in the shower it was six shower heads (12 x 15) ft. One of the guys got an erection and I pointed it out to the guy next to me and we all ran the hell of there soap suds and all.
You're good as long as you go with the wife or girl. The last time I went the lady beside me said she wished her husband would get his feet done. Guys it is a east coochy (forgive the spelling) coupon.