It could depend on penis and vagina size or shape, in my case if I went deep it’s the end of me. The pressure against the head, the snugness around the base of the shaft both combined to finish it sometimes in seconds. Speaking of base of shaft, I had a few occasions where a partner would do nothing but hold my penis as close to my body and give it repeated squeezes. I thought that no stroking and no rubbing would allow me to enjoy the attention for a nice amount of time. Wrong!