“In a 2012 study of ‘high performance boars’, the average duration of ejaculation was around 6 minutes. But there was considerable variation, with one male apparently yielding semen continuously for 31 minutes.

“It is difficult to know whether this kind of protracted ejaculation can occur in the absence of the ‘gloved hand’, but it is certainly a possibility. According to observations of males with real sows, copulation duration is typically 4-5 minutes, but can last up to 20 minutes.”