1. Decide what you actually want from the conversation
Before you say anything, work out what you're asking for. Are you asking for patience while you sort your body out? Are you asking to be touched again without it turning into sex? Are you asking her to stop tiptoeing around the subject? These are different requests, and they get different answers.
Men often open with an apology instead of a request. An apology invites reassurance, and reassurance ends the conversation before anything changes. A request keeps it open.
Try one sentence, decided in advance. "I want us to get back to some kind of physical life, and I need us to talk about how." That is a request. Everything after it is detail.
2. Say the plain facts about leaking during sex
Many men leak at arousal or at orgasm after prostate surgery. It can be a few drops or more. It is urine, it is not dangerous, and it does not mean something has gone wrong with the surgery. It is the same weakened closing mechanism that leaks when you cough, behaving the same way under a different kind of pressure.
Your partner may not know any of this. If she doesn't, her mind will fill the gap with something worse — illness, or the idea that you've lost interest in her. Say the plain version out loud so she isn't guessing.
"I might leak a bit during sex. It's urine, it's harmless, it's part of the recovery. I'd rather tell you now than have you wonder." That is the whole explanation. It does not need building up to.
3. Name what has changed in the erection, separately
Leaking and erections are two different problems and they get tangled together constantly. Nerve recovery after surgery takes a long time and follows its own timetable. Pelvic floor training supports bladder control and can help here too, but they are not the same issue and they do not improve on the same schedule.
Keep them separate when you talk. If you merge them, every conversation about leaking becomes a conversation about whether you can perform, and that is more weight than one conversation can hold.
If erections are your main worry, that is a conversation for your surgeon or GP as well as your partner. There are options. Say that to her too — it changes "this is how it is now" into "this is where we are at the moment."
4. Talk about the practical side without making it clinical
Empty your bladder beforehand. Go easy on fluid in the hour before. A dark towel on the bed sorts out most of what might happen, and takes the worry out of the room. Some men wear a condom during sex specifically to contain leaking; plenty of couples find that entirely fine once it has been discussed rather than sprung on them.
The trick is to agree these things in daylight, fully dressed, in the kitchen. Practical arrangements made in advance feel sensible. The same arrangements made mid-moment feel like an interruption.
Once it is agreed, stop managing it out loud. Set it up, then leave it alone.
5. Handle the moment it happens, in advance
Agree now what you'll both do if you leak during sex. Not a big plan. Just a shared understanding that it is not an emergency and it does not end the evening unless you both want it to.
Most of the damage comes from the reaction, not the leak. If you freeze, apologise and get up, your partner learns that a leak means the end. If you carry on, she learns that it is just something that happens. You are teaching each other how to respond.
It helps to have said, beforehand: "If it happens, I'm going to keep going. Tell me if you want to stop." That puts the decision where it belongs and takes the guesswork out of a moment when neither of you is thinking clearly.
6. Deal with the flinch when she reaches for you
Here is something that goes unsaid for months. You pull back from being touched — not because you don't want it, but because touching leads to arousal, arousal leads to leaking, and you would rather avoid the whole chain. From the outside, that looks exactly like rejection.
This is worth saying straight out, because your partner cannot work it out on her own. "When I move away, it isn't you. I'm heading off something I'm embarrassed about." That one sentence undoes a lot of damage.
Then agree on some contact that goes nowhere on purpose. Sitting close. A hand on the back. Going to bed at the same time. If every touch is a test, you will both stop initiating. Touch that has no destination takes the pressure off both of you.
7. Give her room to say what it has been like for her
Your partner has been through this too. She may have been frightened by the cancer, exhausted by the hospital run, careful with you for months, and quietly lonely. She has probably not said so, because it seemed unfair to complain when you were the one having surgery.
Ask directly and then be quiet. "What's this been like for you?" You may hear things that sting. Hear them anyway. A partner who can say it out loud is a partner who stops carrying it alone.
You do not have to fix what she says. Resist explaining or defending. "I didn't know you felt that" is a complete and honest answer.
8. Set a time to revisit it, then get on with life
One conversation will not cover everything, and trying to make it do so turns the evening into a summit. Better to agree that you'll come back to it — in a few weeks, after the next appointment, when something changes.
In between, keep training and let the results speak. Many men find that as bladder control improves in daily life, arousal leaking settles down as well. Progress in the ordinary hours is progress in the private ones.
Keep the door open with small things. Mentioning a good week. Saying when a night was difficult. The point of the first conversation is not to solve it. The point is that from now on, it is something you can both mention without a run-up.