Why Do They Feel Like This?

I was in the hot tub this morning all by myself just gently playing with my cock and massaging my balls in the hot water and it was feeling rather nice. My wife didn't get in the hot tub with me, but instead stood behind me on the outside and the next thing I felt was her hands on my breasts. She had put a small amount of vaseline in the palm of each of her hands and made sure to rub it all over my tits, before beginning to really feel them up. Her hands felt so very sexy giving each one of my breasts one of the most sensuous massages they have ever had and she has played with my tits many many times, as well as my nipples on countless occassions. I don't understand why it felt so much better having my tits loved then it normally does, but it was almost like my breasts were horny and needed someone's full attention. My wife was amazed at just how fantastic she was making me feel by doing what she has done many times before...playing with my tits and nipples, but this time the feeling was so much more then I've ever experienced and I was loving every second of her feeling me up. I always wear a condom when I'm in our hot tub, because even if I'm in there all by myself more than likely I'll end up masturbating and it helps keep the water clean of cum. Today was no different, except once my wife decided to feel me up there was no need for me to have to stroke my cock any longer and all I did was massage my balls almost as good as my wife was massaging my tits. She was making me feel so very good and the way she was playing with my tits and tweaking my nipples kept me hard, while giving me one small cum after another and let me tell you...I was rather turned on and noisy. I have never felt this good simply from having my breasts felt up, but it was almost like each time she squeezed one of my tits a little bit of cum would squirt into the condom and I couldn't believe how much and how many times she was causing me to have have small cums. My wife enjoys my tits and also gets turned on from feeling me up, but I think that all the added noise I was making turned her on even more and she wanted me out of the hot tub and to get into our bed, where she immediately began to suck on one nipple while playing with the other, then she used both hands to squeeze and massage my tits like never before, making me moan with pure pleasure. I have no idea why my breasts required such attention, but I do know that it's the very first time I was brought to a full orgasm from my nipples being sucked and my tits being felt up and the feeling was glorious.  So, I have learned that men can in fact be brought to a full crashing cum with breast play and I hope to have the feeling repeated in the very near future. I can't make my wife cum from sucking on her nipples and feeling up her beautiful full breasts, but she can surely make her husband cum by doing so. I still have no idea why my breasts were needing such attention, but I'm surely glad they did.