From Nick Wells
The potential contraceptive technique based on blocking calcium ion channels
to retard sperm motility
(13 October, p 6)
may, as Susan Benoff pointed out, need a bit of development.
Calcium ion channels are involved in neural potentiation—so they are
probably involved in the memory process. I can see two scenarios as a result of
this. The contraceptive might fail because it made people forget to take it.
Alternatively, it might work extremely well because couples would get halfway up
the stairs and forget what they were doing in the first place—or, in
extreme cases, that they were having a relationship.
Reigate, Surrey
