My wife and i have just returned from a weeks holiday at the Euronat naturist resort. We normally go down to Cap d'Agde, but for a change we thought we try a different type of resort. I am 43 6' 1" and weigh 14 stone, and my wife is 37, 5' 5", smooth shaven and is a size 10. We are both reasonably attractive and keep quite fit. We are not your usual naturists, we only get 'naked' whilst on holiday, or at a uk beach. Anyway we arrived at Euronat and the weather was crap, either raining or cloudy everyday, so we decided to visit the on site Thalassotherapy centre for the day, for 130 euros each! We both cycled to the centre naked from our wooden chalet and was met at the reception by a young French girl, dressed in her white uniform, who led us to the changing rooms? and gave us both a towel and robe. We were then both taken to the first treatment room where there were about a dozen massage tables, with approximately 50% covered with naked men and women of all ages and sizes. Two more young french girls in their tight white uniforms then instructed my wife and i to remove our robes and lie on our backs, on two adjacent treatment tables. They then began to cover the both of us in some kind of cream from our toes up to our chins. The feeling of a young girl caressing the inside of my thighs, whilst watching another young girl do the same to my wife was amazing and very arousing. I could feel the blood beginning to swell my penis as the girl moved to my stomach. My wife looked over and could see my penis begin to grow, and smiled at me, which made it grow more. By the time the girl had finished applying the cream, my penis was almost fully erect, lying on my stomach. The both of us were then told to go to the showers and wash off the cream. When i stood up, my penis stood out at a 90 degree angle, pointing straight ahead, several of the female staff noticed my semi, as well as one young lad that was working in the centre, and smiled. As my wife and i walked to the showers, she told me to calm down, or we would be thrown out. We entered the shower area, and there were already two middle aged women showering, they saw my penis, smiled and left. My wife then grabbed my cock and began to wank me. I said look who is going to get us thrown out now. She stopped and my penis returned to its normal flaccid state. Next up was a session in individual whirlpool baths. There were two in a line, which faced into the communal area, where there were about 8 or 9 women, lying naked on sun loungers in between treatment sessions. I got into one bath and my wife in the other, and one of the young girls turned the bubbles on. I soon realised that none of the others, or my wife could see my body under the bubbles. So i lay in the bath looking at all the naked women and the most of them shaven, like my wife, and had a wank. Just before i was about to come, the timer ran out and the bubbles finished. So once again as the young French girl cam over to get me out of the bath, i was still semi-erect, which all the women in the communal area could not help but notice. My wife looked and laughed. We both dried quickly and put our gowns on to head for our next treatments, which were to be massages. It was at this point that my wife and i were split up and went into separate treatment rooms. When i arrived at my room, i was met by a young french boy of about 22, who had been in the first treatment room and had smiled when he saw my semi erect penis. We made some small talk, then he asked me to remove my robe and lay on my back on the treatment table. As he started to massage my feet and ankles, he asked what had got me so aroused earlier. I told him that i had found it erotic to be naked and have a young girl move her soft hands all over my body. As he moved up my legs, i began to feel very aroused by the feel of his hands on my body. He asked me if i got the same erotic feeling when it was a young mans hands on my body. I said yes, and that he was making me very aroused. His hands moved further and further up my legs and my penis got bigger and bigger. Eventually, he was at the top of my thighs and i was fully erect. As he moved his hands from my thighs to my stomach he brushed against my now bursting cock. He asked if i liked it, and i moaned, oh yes. He asked if i would like more, so i said yes. He said if he did, i could not tell anybody, as he would get fired. I promised him, i would tell no one, and begged him to continue. He put some massage oil on his hands and began to gently stroke my penis. I asked him to suck me, but he said no, and continued with the wank. But i was too excited, and i came within a couple of minutes. I shot my load of cum all over my chest, face, hair, wall and i think i may have reached the ceiling, such was the ferocity of my ejaculation. I said thank you to him, and asked what i should do next. He told me to go to the showers and clean myself up, and then go to the communal area and wait for my next treatment. And that was it. My first ever Bi experience, which i loved. I have thought about telling my wife, but i don't know what her reaction would be, as i would like to try it again, but may with oral next time. But i am unsure where i could go to try Bi again in this country.