I experienced this a few times but I discovered it after not before having sex with a woman. There was one occasion where I had seen a particular woman of interest's 'weapon of choice' I have a very small penis and many of your average dildos would put me to shame. I know the size doesnt matter thing and that is generally true but there are exceptions. In my experience women who are more accustomed to much larger cocks or sex toys dont have to be size queens per se to be unsatisfied or put off by the more minute members but they actually just had never been with any guy as small as me. I was at a party at this girls house. ( I dont recall her name but I think it was Gwen or Glenda ) I had been flirting with her for a while and she had flirted back on a few occassions before she invited me to her party. I definitely believed it was game on after I got the invite. It definitely seemed that way after the party and intermittant flirtation went on. At some point I needed to use her bathroom. I wanted a fresh towel as the couple that were hanging up had been obviously overused. I decided to check the linen cupboard in the room except it wasn't a small linen cupboard but had various toiletries plus a very large 'porno' sized dildo - It actually put me off so much I not only avoided flirting anymore but not too long after this chastening experience I made some excuse of having to leave early and fled. Afterwards I berated myself at being such a prideful wuss ( but this was in my pre sph fetish era) I never mentioned it to her and within a month or so she had a regular boyfriend so that ship had sailed. Now I certainly wish I had risked a potential drowning in deep waters and tge more I pondered my cowardice the more I was sure that most men couldnt match that size standard so it probably wouldnt have been a deal breaker ( and I am a dab hand at foreplay ) Bloody idjut!