The essential
movement in working the sewing-machine is the flexion and extension of the
ankle, but the muscles of the thighs are used to maintain the feet firmly
on the treadle, the thighs are held together, and there is a considerable
degree of flexion or extension of the thighs on the trunk; by a special
adjustment of the body, and sometimes perhaps merely in the presence of
sexual hyperaesthesia, it is thus possible to act upon the sexual organs;
but this is by no means a necessary result of using the sewing-machine,
and inquiry of various women, with well-developed sexual feelings, who are
accustomed to work the treadle, has not shown the presence of any tendency
in this direction.
Sexual irritation may also be produced by the bicycle in women. Thus,
Moll[210] remarks that he knows many married women, and some unmarried,
who experience sexual excitement when cycling; in several cases he has
ascertained that the excitement is carried as far as complete orgasm. This
result cannot, however, easily happen unless the seat is too high, the
peak in contact with the organs, and a rolling movement is adopted; in the
absence of marked hyperaesthesia these results are only effected by a bad
seat or an improper attitude, the body during cycling resting under proper
conditions on the buttocks, and the work being mainly done by the muscles
of the thighs and legs which control the ankles, flexion of the thigh on
the pelvis being very small.
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