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

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/m 2 ; 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.