Sexual Acting Out and Behavior

Question:

Recently my 7 ½ year old son had a friend for a sleep-over. While I was downstairs they were lying in the same bed. They kept acting up so bad that finally I separated and made them sleep in separate beds. The friend was very hyper so I lay down with him and talked with him until he calmed down and went to sleep.

Some days later we got a concerned call from his father. It seems that our son had talked him into kissing each other on the penis (my wife says my son got the suggestion from another kid.) The friend was uncomfortable about it and told his father, who now wants the children to be separated for a while.

I feel very conflicting emotions – angry at my child, angry at the other father. My son also frequently tries to pull down his 11 year old sister’s pants, and is delighted when she gets very upset. Other than these incidents he has not been bothering other children to my knowledge, although a year ago or more he did do something of the sort with 2 girls, each one on a different occasion.