While I'm incontinent as a male once you become semi or fully aroused it is extremely difficult to urinate even involuntary. But having said that immediately before and after are problematical. My fiancee is aware of this (obviously), so we take precautions. I go to the bathroom before hand and try to urinate, we use a feefo waterproof pad that is washable underneath us, it holds about 2000ml, which contains any leaks, and basically as soon as we are finished I have to put a nappy on as I know that within a minute or two I will flood, that means we can still cuddle afterwards without having to worry. But it's what is best for you, is there a position where you are less likely to leak? The other thing is you are going to have to be honest and open with any new partner, because if they are not aware of your problems and you hide it from them, but then have problems during intercourse they are not likely to appreciate being wee'd on.