The sexual act takes place in the air, and is of very short duration, but is apparently repeated several times, at any rate in some cases.
There thus seems to be no justification for believing, as Schmitz taught, that a second sexual act occurs in the life-cycle of these Florideae.
Turn ing first to the Rhodophyceae, both on account of the high place which they occupy among algae and also the remarkable uniformity in their reproductive processes, it is clear that, as is the case among Archegoniatae, the product of the sexual act never germinates directly into a plant which gives rise to the sexual organs.
Could it mean " No Sex ", advising against engaging in a sexual act at the same time you're entering the freeway?
In some cases a sexual act would appear to precede spore formation.