Sexual habits in childhood affect penis size in later adulthood: a cross-sectional study

Abstract Background Behavioral habits and parental rearing during physical and sexual growth of men can influence to their penis size. Aim To assess the erect penis size in adult Kazakh males and study the influence of their physiological events and behavioral habits during their body growth on their penis size. Methods A cross-sectional survey pilot study with the intention-to-treat. The study included 282 adult Kazakh fertility males aged 23-35 years. Interventions: paper-based survey administration; erect penis length and girth measurement. Two-tailed Student’s t-test, Pearson correlation, and multivariate tests of the MANOVA/MANCOVA were used. The Ethics Committee of the National Research oncology center approved the study. Outcomes In Kazakh men a mean age 29.6±4.4 years; body height 171.56±6.64 cm; BMI 24.53±3.40 kg/m2; erect penis length 13.41±1.04 cm and girth 11.62±0.91 cm. Results There was a significant correlation between erect penis length and girth (P<0.0001). The frequency of erection in 54.7% males was 5-6 times a day. The frequency of masturbation or coitus with ejaculation in 42.2% males was two times per month. 40.9% males abstained to masturbation or coitus in one of two cases. The frequency of nocturnal sperm emission was in 39.1% males one time per month. Frequencies of erection, masturbation/coitus, abstinence to masturbation/coitus, and nocturnal emission have a statistically significant effect (P<0.01) on both erect penis length and girth in Kazakh males in their body growth. Conclusions Sexual abstinence to coitus and masturbation during childhood has a positive increasing affect on the penis size in adulthood. The more males in childhood abstains from ejaculation, the larger their penis size in adulthood. A long-lasting extended erection during body growth has a positive effect on penis enlargement.