My older paint gelding hates having it done to the point where we have the vet come out and do it himself. Even with a little happy juice in his system he will try and bite you and kicks out . I have had him for 10 years and he has always been that way. Luckily he is usually pretty clean. My junior hunter loved having his done and it took all of a few minutes to do. My TB gelding will let you do anything, he looks unamused but will let you do it lol. I would definitely use warm water and some Excalibur, and if he is so bad to the point where you are in danger of being kicked, have the vet give him some sedatives. It is important to do it, and get the bean out. If this is your first time doing it I would enlist the help of someone who has done it.