I caught my daughter (4yr old) touching her private parts under the blanket. I also caught her using the shower hose and spraying it there. I asked her why and she replied it felt good. What is the best way to teach her about this?

Take it light. Take few steps, and don't forget she's just 4. - STOP HER: tell her it's a bad thing. term it ghostly if you've to. until she's old enough - FIND HOW she caught this up. definitely is influenced by a naughty neighbour kid/uncle/aunts. cut off access to neighbours, or move out to good location - Spend enough time with her, divert her mind into games, outdoor play, and TV if you've to first figure how she learnt and take action accordingly