Years ago I had a friend that would help me with this, the house to ourselves for hours we would each cum three or four times, I loved seeing another man spray his load in my girls panties, such a turn on. This was the gateway to my tasting another man's seed, home alone with a fresh load in my girl's panties I had to put them in my mouth a few months later I found myself taking it straight from the source while he was wearing those same panties, these it was, I was a bi-daddy sucking cock for the first time and I loved it.
I've done this thousands of time with my wife and daughter's panties and pantyhose, I love spraying my seed on their clean under things then returning them to the dresser for them to wear some day soon. I wish you and I were neighbors we would have a lot of fun.