Re: mucus in stool?
what misty said is right, mucous in your stool can been seen in IBS/IBS(this encompasses Crohn's and ulcerative colitis), infections, anal fissures and SBO's(small bowel obstruction)(heck you can see it in a colonic obstruction)
it's normal to have some mucous in your stool, you intestinal walls have glands that secrete mucous(cellular debris from the sloughing intestinal wall gets trapped in this too), but it's usually a scant amount relative to the amount of stool you pass, so much that for the most part people don't notice that they're passing mucous because it just thinly coats the stool ...
don't know about the smell and heck man ... why are you smelling your bowel movement mucous ... not to mention making the comparison between it's smell and that of semen ... dude that's way too much info
anyways, as an FYI, approximately 50% of people with the diagnosis of IBS, complain of mucous containing bowel movements ... as long as your not tons of diarrhea, night time accidents 2o/2 diarrhea, blood in your poop or poop that floats or creates an oil slick on the top of the toilet water, you may very well have IBS/subclinical IBS(there are strict research criteria for IBS and the different subtypes, some doc use 'em for the diagnosis, some don't)
by the way, not all IBS involves diarrhea; you can have a constipation subtype of IBS, where you get hard/lumpy poops
but wouldn't hurt if you mentioned this to your MD next time you see her/him
best of luck