[lamchopz]

ok, I asked a senior tutor today (she completed her Ph.D. ages ago but didn't take up lecturing) and she confirmed all of the opinions thus far: "No, it doesn't happen". She said even in long term, it shouldn't matter much because as far as she knows, that drugs can get into the semen has not been observed or established, unlike in the case of STDs.

So my final answer is: No, the couple should have nothing to worry about.

Cheers,