So this was about two years ago, I was dating this really hot girl and she had me to where I loved doing whatever she told me.  One day we are going to fuck and I didn't get hard.  She tells me to use her dildo on her and just eat her out.  She apparently enjoyed it because for the next two months, even if I was hard, we didn't fuck.  I just got between her legs and used her dildo on her.  She even made me suck on it before and after. 

But after two months she told me that she had an idea.  She was going to cuckold me (like from Shakespeare, she said).  She was going to sleep around every weekend and I would service her with the dildo when she wanted.  One night she even brought a guy back to the apartment and told me to sleep on the couch.  She apparently liked that because the next morning she told me she was going to start doing it more and that on weekends I would wear panties. 

One thing led to another, and I got to where I was wearing panties every day and she was using the dildo on me.  After a while she moved away and we broke up but I got so used to the softness of panties that I still only wear them.