Bedposted.com.

It's for SEX. Complete with PARTNER LOGINS.

Set aside the jokes about "user interface" and "plug-ins" for a sec.
I can see this being an amusing app for curious couples and swingin' singles. (Or, curious singles and swingin' couples.)
I mean, if you want to submit that kind of personal info online, I'm presuming this is NOT Google-searchable.
But...
That field marked "name" is a little worrisome.
Can you honestly not recall your partners within the last month?
Week?
Do you really need a spreadsheet to track your sex habits?
heh, spreadsheet.
If so, mazeltov. I'm sure you're having a great time.
I also hope you're registered here, if applicable - or at least have a great doctor to keep you kosher.