Just wanted to add my two cents.
Last year I did PE for only three months (September 2016 - February 2017 resting November and December) and had nice gains (1.5 cm, newbie bonus I think).

It has been almost one year since I stopped.
Have not lost a single mm either in length or in girth.

●●Glowsticker●●

START ■ 09/16 BPEL: 16.5 cm, EG: 13.2 cm ■ ■ CURRENT: BPEL: 17.7 cm, EG: 13.5 cm

☆☆GOAL: +20 cm BPEL, +15 cm EG☆☆