My son is 16.He is in a boys only school.He is tennis champion of his school.He is not that much good player.He believes that none of girls are good in any sports.I even arguued with him about it.Then I decided myself to take the challange.I used to play tennis at my schooltime.When game started I realized he is not at all good in tennis.In any other situations I may let him to win.I got two sets easily.But 3 set game is only for woman and for boys game is out of 5 sets.He also told me that he was only checking my game,So I decided to play powershot.At on point of game he came near to net to play a shot but seeing that I gave a powershot.The ball hit his testicles.He collapsed there and start to cry and moan.His voice changed to like 3 year old girl'I helped him to his room and gave some ice.Although he feel better but still he is walking with openlegs.It is funny to others like my sister and her daughter to see him walking with cupping his privates.But he is embarrassed even to talk to me or my sister.he is just spending time in his room.How could i remove his fear and embarrassment?Please help me to get friendly with my only child