You are right, some girls are easier than others. My W has never had an orgasm through intercourse. And due to the "pressure" she has trouble through other modes of stimulation. Mechanical means is so intense that it is able to get through all of that.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018