The hardness of an erection can be conveniently graded as above

1 – Tofu : soft and incapable of penetration

2 – Peeled Banana : stronger but still sub optimal for penetration

3 – Unpeeled Banana : capable of penetration but not optimally hard

4 – Cucumber : what every men wants !

Anything grade 3 and below will be considered as Erectile Dysfunction (either the inability to achieve a grade 4 erection or the inability to maintain an erection during intercourse).  If you feel that your erection is not optimal or unable to last, help is available !