* LOW DOSE is the word, re using shrooms as an aphrodisiac... I have enough troulble finding my way around 'down there' when I'm straight, let alone with visuals going on !!
RE general things that are fun to do on shrooms, I concur with above advice bout avoiding strangers while tripping, bars etc are not advised... also, take the phone of the hook and lock the door if you're gonna trip in your own house... unwanted calls from parents/ straight-edge friends etc can be a real downer while tripping, not to mention a bit hard to explain the next day...
Baths are really nice, don't burn yourself though... like pot, shrooms can mess with your powers of temperature perception...
Music is great tripping, your favourite tunes, and new stuff... also, if you happen to be a musician, try jamming on shrooms... WICKED!!
Nature is nice on shrooms, the beach, forests etc, just make sure there's no mine-shafts/ health hazards around, and preferrably have a non-tripping (but mellow/ trusted/ open minded) friend around, to 'mind' you...
Pot is good on shrooms, if you're used to it... it certainly causes the trip to kick in harder or faster in some people, which could make them freak out, so go easy (one toke might be plenty!) though...
If you are an artist, (or even if you're not) drawing/ painting/ sculting is fun too, don't worry how bad your creations look the morning after, it's the fun you have at the time that matters...
Above all, be around a few trusted friends when you trip, and try to have a straight person that you trust around also, to 'mind' you, should the need arise for a rational decision of any sort...