Intimate Earth understands that anal sex is becoming more popular and losing its stigma. However, many products on the market are simply not safe. Unlike other anal serums or creams that can numb the sphincter and lead to tearing, our herbal serum causes no anesthetic effects. The anal sphincter becomes relaxed and therefore penetration becomes more comfortable. Intimate Earth natural anal relaxing serum does not contain the synthetic compound benzocaine. 3ml Foil.