Being too close can also be a problem. This isn't about erotic purposes, but for friends who look like they're in pain when erect, best friends who will allow just some grinding without penetration. Even though they blush and say 'No way, absolutely not' while getting angry, their vaginas are strangely wet, so the tip goes in and out due to accidents, sometimes even all the way in, repeating 'Stop it, stop it,' but they don't go home and keep rubbing their genitals. This is true friendship! The four ultimate scenarios!
