Like someone that posted a few months ago, I too really enjoy the feel of wearing nylon spandex leotards. I am married and my wife doesn't mind. She thinks I look good in a leotard (especially if I get a hard-on). I will sometimes wear them around the house, while watching TV, working out, or with nylon shorts on a bike ride. I think it's a combination of the smooth stretchy material and no waistband to confine my cock when it gets hard that makes it feels so good.
Anyway, I also often wear them at night when sleeping. Sometimes we will even have sex while wearing them. I will just slip my cock out the leg. Most often though, since my wife is not always in the mood, I will wake up in the early morning slowly hump my blanket until I am about ready to cum. If my wife is watching, just before I cum I will slip my cock out the leg opening and give myself a few last good pumps with my hand before letting my load squirt out (she likes to see how far I can shoot it). Other times I will just let myself go inside the leotard filling it with cum. I have several pairs so I can change to another while the first pair dries. I'll wear the clean pair around the house that day. Then the next night, I will put the first pair back on and repeat the process adding another load of semen to the inside of them. After a few times of this the dried cum and their stains are also a turn on.
I encourage all guys to experience the feel of spandex. I have some unitards and tights too but enjoy the leotards the best. When I'm not wearing a leotard, I have a good collection of nylon panties to wear (most that my wife bought me) but that's another story.