The way by which a man measures his level of fitness. If his body mass becomes too large he will not be able to see his penis in which case he is overweight; however, if he is able to look down and see his penis, everything is good.
Situation 1:
Wife: "You are putting on too much weight."
Husband:(Looks down and sees Penis) "Nope I'm good, my penis to mass ratio is normal."
Situation 2:
Doctor: You need to lose some weight if you want to stay healthy"
Patient: "I thought so to, but I got a boner this morning and my penis to mass ratio seems fine."
When a man lends a sympathetic ear to a woman immediately after a break up in order to sleep with her.
To feign empathy and/or compassion for a chick, often for a period of days or even weeks, who has recently had a girl-crisis in order to fuck her.
When a man is emotionally unavailable but sexually available to a girl who is going through a hard time.
Jonh: Dave, where the fuck have you been? I haven'tseen you in days.
Dave: Oh, sorry dude. Amy just broke up with her boyfreind and I'm giving her a penis to cry on.
John: Just make sure your intentions are clear enough so that shit doesn't back fire and you end up in the Freind Zone. (i.e. she understands that she will have to start putting out in order to continue to get the loving care she so desperately needs)