No. One application of cologne to the scrotum is not of any concern.
No. But possibly skin irritation temporarily.
Baby oil and cancer. Skin with baby oil soaks up the sun faster than dry skin alone. The sun's harmful uv rays react with the shiny oil, penetrating deeper into the skin. Although the tan will be darker, the process increases the amount of uva and uvb rays that get into the skin. According to the skin cancer foundation, uv rays damage skin cell's dna, leading to a higher potential for genetic mutation and skin cancer. Read more...