Interestingly, the genetically modified mice still showed the classic male-mating repertoire mounting, penetration and ejaculation.

ECONOMIST: Behaviour of the sexes

But while Logan cautions that although the act of ejaculation would likely not be impeded in space, microgravity would do nothing to enhance it.

FORBES: Sex In Space No Panacea For Conception Challenges, Says Former NASA Flight Surgeon

Your doctor may prescribe one of several selective serotonin reuptake inhibitors (SSRIs), such as sertraline (Zoloft), paroxetine (Paxil) or fluoxetine (Prozac), to help delay ejaculation.

CNN: Premature ejaculation

If the timing of your ejaculation doesn't improve, your doctor may prescribe the tricyclic antidepressant clomipramine (Anafranil), which also has been shown to benefit men with this disorder.

CNN: Premature ejaculation

They stay alive for only six to ten hours after ejaculation, so a stud ram from Wales cannot easily inseminate a Scottish ewe without going to meet her.

ECONOMIST: The search for long-lived sheep sperm