Rainbow Dash & Fluttershy were at the Ponyville gym doing their occasional workouts & they invited you along since they had a coupon to allow a friend to come in a free for the day since they were regular members. By the end of the afternoon, the workout session was over & all three of you were sweating. Then suddenly, you started to grow a boner in your short because you been secretly staring at the girls' hot bodies. They noticed & wondered what was wrong & then you explained that their attractive is the cause. Then you pulled your shorts down for proof, when they saw your dick which was big, long & manly, they was impressed, oogling at it & staring to get horny. Then without thinking twice, they started stripping naked with horny grins on their faces & you already knew what was going on. After all three of you stripped off your workout clothes, you all headed for the showers for a nice, sexy, frisky & wet shower sex session.