The first time I tried on tights and a leotard (actually, the leo alone was first, then I tried on the tights), I found them at the Goodwill store as a set, XL so I knew they would fit me. I drove home, smoked a J on the way and by the time I got to the house I was already wet in my undies.
I quickly dumped my jeans, tee shirt and tighty-whiteys, and pulled on the leotard. It was a black, scoop neck job, nylon and cotton, very stretchy, and fit perfectly. Getting my arms in was tricky... had to work on my flexibility! but that part was fun too.
I noticed how the crotch covered everything, as if the leo was for men. May have been; there was only a Danskin XL on the tag. The leg elastic (tunnel, not exposed) was right up against my crotch, and my balsac and penis were completely inside the leotard crotch. It felt great! Good support. I walked around the house stoned, in my leotard, doing chores. Vacuuming was never so fun!
Every time I moved, the leotard stimulated my skin everywhere. I had a boner the whole time. I started using exaggerated moves, to maximize the "feel" of the leotard on me, as I vaccuumed, swept and dusted. The house was in real good shape by the time I was done!
I suddenly remembered the tights!
I rushed to the front room to get the bag they were in. I quickly cut the tag off and figured out how to slip them over my bare feet. I had tried pantyhose before, and didn't like them. Maybe tights would be different.
They were.
Tights are much thicker than pantyhose.
These had foot stirrups, which really added to the thrill of putting them on.
I pulled them up over my thighs, and over my leotard, all the way up over my belly. It was an awesome scene, when I looked in the mirror... Billy in leotard and tights.
By now my boner was straight up, but more or less hidden by the thick tights and leotard material. It still felt great and I touched myself often there, disbelieving my good luck in finding such an outfit. I commenced calisthenics, to loosen my muscles and to further enjoy the stimulation of my new "skin". I ended up on my stomach, hard bulge against the carpet, and enjoyed the feel of my bubble-butt in the tights. I pulled the tights down, and there was my arse again in just the leotard. I snapped the leg elastic all around, enjoying the stinging sensation of the tunneled elastic on my upper thighs. I started to hump the floor; it felt marvelous! I grabbed a pillow, folded it lengthwise, and proceeded to hump that thing like a dog. My cock found a nice tunnel in the leotard, and the stimulation of the nylon material brought me to a very satisfying orgasm.
I lay there a recovered; then I undressed, and washed my new outfit, knowing that in an hour my "new" leotard and tights would be clean and dry and I could put them on again.