• Johanna Bendas, Janniko R Georgiadis, Gerhard Ritschel, Håkan Olausson, Kerstin Weidner, and Ilona Croy.
• Department for Psychotherapy and Psychosomatic Medicine, Dresden University Hospital, Technische Universität Dresden, Dresden, Germany. Electronic address: johanna.bendas@gmail.com.
• J Sex Med. 2017 May 1; 14 (5): 645-653.

BackgroundUnmyelinated low-threshold mechanoreceptors-the so-called C-tactile (CT) afferents-play a crucial role in the perception and conduction of caressing and pleasant touch sensations and significantly contribute to the concept of erotic touch perception.AimTo investigate the relations between sexual desire and sexual performance and the perception of touch mediated by CT afferents.MethodsSeventy healthy participants (28 men, 42 women; mean age ± SD = 24.84 ± 4.08 years, range = 18-36 years) underwent standardized and highly controlled stroking stimulation that varied in the amount of CT fiber stimulation by changing stroking velocity (CT optimal = 1, 3 and 10 cm/s; CT suboptimal = 0.1, 0.3, and 30 cm/s). Participants rated the perceived pleasantness, eroticism, and intensity of the applied tactile stimulation on a visual analog scale, completed the Sexual Desire Inventory, and answered questions about sexual performance.OutcomesRatings of perceived eroticism of touch were related to self-report levels of sexual desire and sexual performance.ResultsPleasantness and eroticism ratings showed similar dependence on stroking velocity that aligned with the activity of CT afferents. Erotic touch perception was related to sexual desire and sexual performance in a gender-specific way. In women, differences in eroticism ratings between CT optimal and suboptimal velocities correlated positively with desire for sexual interaction. In contrast, in men, this difference correlated to a decreased frequency and longer duration of partnered sexual activities.Clinical ImplicationsThe present results lay the foundation for future research assessing these relations in patients with specific impairments of sexual functioning (eg, hypoactive sexual desire disorder).Strengths And LimitationsThe strength of the study is the combination of standardized neurophysiologic methods and behavioral data. A clear limitation of the study design is the exclusion of exact data on the female menstrual cycle and the recruitment of an inhomogeneous sample concerning sexual orientation.ConclusionThe present results provide further evidence that unmyelinated CT afferents play a role in the complex mechanism of erotic touch perception. The ability to differentiate between CT optimal and suboptimal stimuli relates to sexual desire and performance in a gender-specific way. Bendas J, Georgiadis JR, Ritschel G. C-Tactile Mediated Erotic Touch Perception Relates to Sexual Desire and Performance in a Gender-Specific Way. J Sex Med 2017;14:645-653.Copyright © 2017 International Society for Sexual Medicine. Published by Elsevier Inc. All rights reserved.

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