I actually didn't quite get the one below until today. . . .hilarious!
Dr. Kohlzak: [at a Sperm Bank and Fertility Clinic, unbeknownst to Frank, who's faking an old football injury] When did you first notice the problem?
Frank Drebin: In the backyard, with my uncle.
Dr. Kohlzak: In the backyard... with your uncle?
Frank Drebin: Yes, when he comes over we like to go out in the backyard and throw it around for a while.
Dr. Kohlzak: And what did you and your uncle find out?
Frank Drebin: Oh, I can't keep up with him, mine hurt especially on the long ones. I can't seem to straighten it out, it has no feeling, it's... it's kind of numb. I may have yanked it too much maybe.
Dr. Kohlzak: [Hands him a cup and opens a door to another room] If you would.
Frank Drebin: For what?
Dr. Kohlzak: A sperm count.
Frank Drebin: In here?
Dr. Kohlzak: Well, it's not exactly the backyard, but it'll do.
Lt. Frank Drebin: Now, Jane, what can you tell us about the man you saw last night?
Jane Spencer: He's Caucasian.
Ed Hocken: Caucasian?
Jane Spencer: Yeah, you know, a white guy. A mustache. About five-foot-ten.
Lt. Frank Drebin: That's an awfully big mustache.
Frank Drebin: Well... We shot a lot of people together. It's been great. But today I retire, so if I do any shooting now, it'll have to be within the confines of my own home. Hopefully, an intruder and not an in-law, like at my bachelor party.
_________________
All your bass are belong to us.