Nipples!! I call them my “turbo buttons” when I’m engaged in prostate stimulation, particularly Aneros models. OMG if I’m on the edge of a hands-free orgasm I can play a game and hold out until I have to O and a few tweaks of my nipples and it’s a full body rush. Amazing shit!!
Strangely, when I’m getting head from my wife or she’s got her hands on me, if I work my nipples I tend to lose some EQ where my prostate and other things in me get aroused and start flexing and “get off.” When I have my best hands-free Os while stim’ing my prostate, my cock is usually soft or just half hard at best. For me, at least, there is a connection between my erection, my prostate, and my nipples in regards to what kind of orgasm I’m going to have.
My wife, on the other hand, I’ve made her cum so many times from just light pulling and turning of just one of her nipples!!! She cums all the time from almost anything, so I can’t just tease her during the day and really have to watch how I play with her breasts. Some nipple stim is fine but too much and she needs to stay in for a little bit!
Starting length, Spring 2003: bpel 6 3/8", bpfsl ~6 1/2", flaccid ~3-4" (never measured flaccid stretched or hanging flaccid; starting girth was probably ~5"-5 1/4")
Summer 2004: bpel 7 7/8", bpfsl 8 1/8", flaccid ~4", erect girth 5.3"
Spring 2018: bpel 7 1/4", bpfsl 7 5/8", erect girth 5 1/8"; Spring 2020: bpel 7 3/4", bpfsl 8", erect girth 5 3/8". Current - August 2023: bpel 7 3/4", bpfsl 8", erect girth mid shaft 5 1/4" (5 1/2" at base)