Hi. i just read your post about your goat jumping on you. I too have a male goat who is now wethered, but still would jump on me and.... well you know. I was reading a post somewhere, no clue no as it was months ago. They said you need to show them who is boss and floor him. Keep him pushed on the ground until he quits struggling. I did this and after 3 times, have had no more problem. My goat is 150 pounds and it took everything I had in me, but solved the problem. Be gentle, but firm. He will get the hint.
Good luck!!