If your problem is genuine and then if you are in trouble, then I would like to suggest that you try aphrodisiacs.

Search the internet for aphrodisiacs. There are lots of aphrodisiacs if you search in sites like amazon.Here is the link http://www.amazon.com/s/ref=nb_ss_gw_3_11?url=search-alias%3Daps&field-keywords=aphrodisiac+&sprefix=aphrodisiac&sprefix=aphrodisiac&sprefix=aphrodisiac&sprefix=aphrodisiac

There is a substance called 'Horny goat weed' where I used to work.

I hope then the sexual desire, you will gain will suppress the pain that you have to endure during the penetration.  Yeah alcohol and drugs increases your sexual desire to some extent and makes you horny.

I hope this will help a bit.