I hsve just come out of a 20 yr relationship, I had my Ileostomy 10 yr ago that made no difference to my partner. Now I need to know answers to the same question you are asking but are we not going to be biased. I don't think it would make a difference to me if a guy had a bag on but as I have one its easy fir me to say that. The fact is we have these now and have to get on with life positively. All I know is I don't want to be alone. I am enjoying it at the moment and getting plenty of attention but not responding as feel like I have to hold bk. Al do when do you tell someone you have a bag on? When you get to know them? It's a hard one.
Hope your recovery goes well.