pineapple, having a strong sweet flaour, somehow affects semen. it makes it taste sweet.... which is convenient if you're getting a blowjob and the other person likes sweet things.
I actually read a blog by a couple who tried the effects of a vegetarian diet, a lot of meat, smoking and drinking lots of pineapple juice on semen. They did each of those for several weeks I think. And she said she didn't actually like the taste of semen, but that pineapple juice actually made it taste sweet and enjoyable for her. But he drank lots for one or two weeks straight.
It does work, but its affected by the whole of the diet and lifestyle of the guy
If he drinks a litre pineapple juice but then eats lots of pork and sugar, drinks lots of coffee and never exercises then it won't have much of an effect
pineapple makes semen taste sweet
If he drinks a litre pineapple juice but then eats lots of pork and sugar, drinks lots of coffee and never exercises then it won't have much of an effect