The sensation as your feel a smooth lycra tentacle push into your ass is is making your cock rock hard. Eric looks down and says, "You sure love that suit"
You close your eyes slowly while saying, "Yes...this is awesome"
Eric turns to catch up with the group. You see that his suit has done the same, each of Eric's ass cheeks is outlined clearly by the suit.
You enjoy the growing member inside your ass as it caresses your prostate area. As you walk, you no longer notice your huge erection and throbbing balls, as they are gently massaged in a side to side motion by the smooth fabric as you walk.
Eric has stopped in front of you. You smile as you see a bit of movement of his suit between his ass cheeks. He's got a new friend growing inside him too.