Relier Pairs Developmental MilestonesVersion en ligne When do you believe these behaviors first appear in a young person's life? par ISRC Widener 1 Begin to recognize traditional male and female gender roles 2 Experience an erection or vaginal lubrication 3 May engage in same-gender sexual exploration 4 Become aware of how their body functions 5 Have an understanding of their own sexual orientation 6 Value privacy highly 7 Touch their genitals for pleasure 8 Feel curious about bodies 0-3 years old 9-12 years old 4-5 years old 0-3 years old 6-8 years old 13-17 years old 4-5 years old 4-5 years old