Cumming in panties. Since I was about 12 I've enjoyed wanking into panties. First my mother's and aunty's but over the decades any I can find wherever I travel. Usually used from laundry baskets, but often clean ones if they are white.
I use my wife's all the time and she'll often watch. I have several friends of hers who also enjoy watching. Biggest thrill is to see them wear them after