The very first time I ever ejaculated was in panties. I was 10, and hadn't even touched myself - the feeling of the panties rubbing on my hairless cock and balls made me cum (it was absolute bliss).
I'm in my 60's now and have been wanking and spunking in panties ever since - just like I am doing now as I write.
The look of petty and feminine panties stretched tightly over a mans penis and balls is my greatest turn on and I spend hours drooling over photos on the net, dreaming of taking their cocks out of their panties to suck, wank and drink down their sperm. I was born to be a cocksucker.
I have worn crotchless knickers (mine and other peoples) and like to show off my shaved genitals in them (my cock and balls waving about as I move) but, for me, it is the hold of the panties around my junk that turns me on.
I am at my happiest, masturbating my sissy cock in panties till I spunk.
Happy wanking.