What guys do that don't have sisters? I'll tell you.
When I was about 12 I found myself home alone for the day. At that time I never had masturbated or anything like that. But I always had a strange fascination with my mom's panties and bras.
So that day I decided to put them on. They were a maroon color with fancy, edged lacing in the regular crotch area, not a thong or anything. I instantly had a boner.
So I started rubbbing my cock through her panties and I loved it. I rubbed it till I saw a little wet mark right where my pee hole was. I pulled my cock out to the side and wondered what it was, it was so slippery I began rubbing it all over my cock. It reminded me of spit, so I lathered up my hand and started rubbing it all over, even my balls.
I instantly found myself cupping my hand and sliding it up and down my shaft. My legs started to quiver and my cock started to feel this intense feeling it never felt before. Next thing I knew I felt this wet substance falling all over my stomach and legs. I sat up and looked and saw this white goo I had never seen before.
That was the first time but not the last of wearing my moms panties.